<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:xhtml="http://www.w3.org/1999/xhtml">
  <url>
    <loc>https://markduck.com/?lang=zh-CN</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com" />
  </url>
  <url>
    <loc>https://markduck.com/?lang=en-US</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial?lang=zh-CN</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial?lang=en-US</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial" />
  </url>
  <url>
    <loc>https://markduck.com/quiz?lang=zh-CN</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/quiz?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/quiz?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/quiz" />
  </url>
  <url>
    <loc>https://markduck.com/quiz?lang=en-US</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/quiz?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/quiz?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/quiz" />
  </url>
  <url>
    <loc>https://markduck.com/practice?lang=zh-CN</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/practice?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/practice?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/practice" />
  </url>
  <url>
    <loc>https://markduck.com/practice?lang=en-US</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/practice?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/practice?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/practice" />
  </url>
  <url>
    <loc>https://markduck.com/convert?lang=zh-CN</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/convert?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/convert?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/convert" />
  </url>
  <url>
    <loc>https://markduck.com/convert?lang=en-US</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/convert?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/convert?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/convert" />
  </url>
  <url>
    <loc>https://markduck.com/applications?lang=zh-CN</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/applications?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/applications?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/applications" />
  </url>
  <url>
    <loc>https://markduck.com/applications?lang=en-US</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/applications?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/applications?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/applications" />
  </url>
  <url>
    <loc>https://markduck.com/notes?lang=zh-CN</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/notes?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/notes?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/notes" />
  </url>
  <url>
    <loc>https://markduck.com/notes?lang=en-US</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/notes?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/notes?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/notes" />
  </url>
  <url>
    <loc>https://markduck.com/about?lang=zh-CN</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/about?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/about?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/about" />
  </url>
  <url>
    <loc>https://markduck.com/about?lang=en-US</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/about?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/about?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/about" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/basic?lang=zh-CN</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/basic?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/basic?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/basic" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/basic?lang=en-US</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/basic?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/basic?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/basic" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/basic/headings?lang=zh-CN</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/basic/headings?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/basic/headings?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/basic/headings" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/basic/headings?lang=en-US</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/basic/headings?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/basic/headings?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/basic/headings" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/basic/paragraphs?lang=zh-CN</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/basic/paragraphs?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/basic/paragraphs?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/basic/paragraphs" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/basic/paragraphs?lang=en-US</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/basic/paragraphs?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/basic/paragraphs?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/basic/paragraphs" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/basic/emphasis?lang=zh-CN</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/basic/emphasis?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/basic/emphasis?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/basic/emphasis" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/basic/emphasis?lang=en-US</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/basic/emphasis?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/basic/emphasis?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/basic/emphasis" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/basic/lists?lang=zh-CN</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/basic/lists?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/basic/lists?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/basic/lists" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/basic/lists?lang=en-US</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/basic/lists?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/basic/lists?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/basic/lists" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/basic/links?lang=zh-CN</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/basic/links?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/basic/links?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/basic/links" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/basic/links?lang=en-US</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/basic/links?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/basic/links?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/basic/links" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/basic/images?lang=zh-CN</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/basic/images?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/basic/images?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/basic/images" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/basic/images?lang=en-US</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/basic/images?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/basic/images?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/basic/images" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/basic/code?lang=zh-CN</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/basic/code?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/basic/code?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/basic/code" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/basic/code?lang=en-US</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/basic/code?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/basic/code?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/basic/code" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/basic/blockquotes?lang=zh-CN</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/basic/blockquotes?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/basic/blockquotes?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/basic/blockquotes" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/basic/blockquotes?lang=en-US</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/basic/blockquotes?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/basic/blockquotes?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/basic/blockquotes" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/basic/autolinks?lang=zh-CN</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/basic/autolinks?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/basic/autolinks?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/basic/autolinks" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/basic/autolinks?lang=en-US</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/basic/autolinks?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/basic/autolinks?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/basic/autolinks" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/basic/line-breaks?lang=zh-CN</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/basic/line-breaks?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/basic/line-breaks?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/basic/line-breaks" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/basic/line-breaks?lang=en-US</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/basic/line-breaks?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/basic/line-breaks?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/basic/line-breaks" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/advanced?lang=zh-CN</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/advanced?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/advanced?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/advanced" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/advanced?lang=en-US</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/advanced?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/advanced?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/advanced" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/advanced/tables?lang=zh-CN</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/advanced/tables?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/advanced/tables?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/advanced/tables" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/advanced/tables?lang=en-US</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/advanced/tables?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/advanced/tables?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/advanced/tables" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/advanced/task-lists?lang=zh-CN</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/advanced/task-lists?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/advanced/task-lists?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/advanced/task-lists" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/advanced/task-lists?lang=en-US</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/advanced/task-lists?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/advanced/task-lists?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/advanced/task-lists" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/advanced/footnotes?lang=zh-CN</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/advanced/footnotes?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/advanced/footnotes?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/advanced/footnotes" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/advanced/footnotes?lang=en-US</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/advanced/footnotes?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/advanced/footnotes?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/advanced/footnotes" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/advanced/horizontal-rules?lang=zh-CN</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/advanced/horizontal-rules?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/advanced/horizontal-rules?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/advanced/horizontal-rules" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/advanced/horizontal-rules?lang=en-US</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/advanced/horizontal-rules?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/advanced/horizontal-rules?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/advanced/horizontal-rules" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/advanced/escaping?lang=zh-CN</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/advanced/escaping?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/advanced/escaping?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/advanced/escaping" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/advanced/escaping?lang=en-US</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/advanced/escaping?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/advanced/escaping?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/advanced/escaping" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/advanced/html?lang=zh-CN</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/advanced/html?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/advanced/html?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/advanced/html" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/advanced/html?lang=en-US</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/advanced/html?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/advanced/html?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/advanced/html" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/advanced/reference-links?lang=zh-CN</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/advanced/reference-links?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/advanced/reference-links?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/advanced/reference-links" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/advanced/reference-links?lang=en-US</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/advanced/reference-links?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/advanced/reference-links?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/advanced/reference-links" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/advanced/image-links?lang=zh-CN</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/advanced/image-links?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/advanced/image-links?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/advanced/image-links" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/advanced/image-links?lang=en-US</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/advanced/image-links?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/advanced/image-links?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/advanced/image-links" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/advanced/nested-lists?lang=zh-CN</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/advanced/nested-lists?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/advanced/nested-lists?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/advanced/nested-lists" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/advanced/nested-lists?lang=en-US</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/advanced/nested-lists?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/advanced/nested-lists?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/advanced/nested-lists" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/extended?lang=zh-CN</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/extended?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/extended?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/extended" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/extended?lang=en-US</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/extended?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/extended?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/extended" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/extended/mermaid?lang=zh-CN</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/extended/mermaid?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/extended/mermaid?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/extended/mermaid" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/extended/mermaid?lang=en-US</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/extended/mermaid?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/extended/mermaid?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/extended/mermaid" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/extended/emoji?lang=zh-CN</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/extended/emoji?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/extended/emoji?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/extended/emoji" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/extended/emoji?lang=en-US</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/extended/emoji?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/extended/emoji?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/extended/emoji" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/extended/math?lang=zh-CN</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/extended/math?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/extended/math?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/extended/math" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/extended/math?lang=en-US</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/extended/math?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/extended/math?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/extended/math" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/extended/abbreviations?lang=zh-CN</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/extended/abbreviations?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/extended/abbreviations?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/extended/abbreviations" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/extended/abbreviations?lang=en-US</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/extended/abbreviations?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/extended/abbreviations?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/extended/abbreviations" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/extended/frontmatter?lang=zh-CN</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/extended/frontmatter?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/extended/frontmatter?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/extended/frontmatter" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/extended/frontmatter?lang=en-US</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/extended/frontmatter?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/extended/frontmatter?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/extended/frontmatter" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/extended/alerts?lang=zh-CN</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/extended/alerts?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/extended/alerts?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/extended/alerts" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/extended/alerts?lang=en-US</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/extended/alerts?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/extended/alerts?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/extended/alerts" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/extended/markdown-best-practices?lang=zh-CN</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/extended/markdown-best-practices?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/extended/markdown-best-practices?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/extended/markdown-best-practices" />
  </url>
  <url>
    <loc>https://markduck.com/tutorial/extended/markdown-best-practices?lang=en-US</loc>
    <xhtml:link rel="alternate" hreflang="zh-CN" href="https://markduck.com/tutorial/extended/markdown-best-practices?lang=zh-CN" />
    <xhtml:link rel="alternate" hreflang="en-US" href="https://markduck.com/tutorial/extended/markdown-best-practices?lang=en-US" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://markduck.com/tutorial/extended/markdown-best-practices" />
  </url>
</urlset>
