diff --git a/package-lock.json b/package-lock.json
index cfcf1f5..91a6ba0 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "markdown-downloader",
-  "version": "1.0.0",
+  "version": "1.0.3",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -2299,6 +2299,12 @@
         "semver": "^6.0.0"
       }
     },
+    "mathjax": {
+      "version": "3.2.2",
+      "resolved": "https://registry.npmmirror.com/mathjax/-/mathjax-3.2.2.tgz",
+      "integrity": "sha512-Bt+SSVU8eBG27zChVewOicYs7Xsdt40qm4+UpHyX7k0/O9NliPc+x77k1/FEsPsjKPZGJvtRZM1vO+geW0OhGw==",
+      "dev": true
+    },
     "md5": {
       "version": "2.3.0",
       "resolved": "https://registry.npmmirror.com/md5/-/md5-2.3.0.tgz",
diff --git a/package.json b/package.json
index c35602b..8044b21 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "markdown-downloader",
-  "version": "1.0.2",
+  "version": "1.0.3",
   "description": "markdown文章下载",
   "main": "dist/index.js",
   "scripts": {
@@ -42,6 +42,7 @@
     "cross-env": "^7.0.3",
     "html-to-md": "^0.5.3",
     "jszip": "^3.7.1",
+    "mathjax": "^3.2.2",
     "md5": "^2.3.0",
     "path-browserify": "^1.0.1",
     "webpack": "^5.63.0",
diff --git a/src/index.js b/src/index.js
index 642d2f6..4b12513 100644
--- a/src/index.js
+++ b/src/index.js
@@ -1,103 +1,22 @@
 import md5 from 'md5'
-import path from 'path-browserify'
 import html2markdown from 'html-to-md'
 import { websites, hooks } from './websites'
 import merge from 'webpack-merge'
+import 'mathjax/es5/tex-svg'
+import { 
+  isExtension,
+  getExt,
+  query,
+  getText,
+  getAttribute,
+  queryAll,
+  noop,
+  sendMessage,
+  formatDate,
+  insertAfter,
+  getUrl
+} from './utils'
 
-const isBroswer = typeof window !== 'undefined' && window instanceof Object
-const isExtension = isBroswer && window.chrome instanceof Object && window.chrome.runtime
-
-const getExt = (fileName) => {
-  return path.parse(fileName).ext.slice(1)
-}
-
-const query = (selector, context = document) => {
-  if (selector instanceof NodeList || selector instanceof Node) {
-    return selector
-  }
-  return context.querySelector(selector)
-}
-
-const getText = (selector, context = document) => {
-  const el = query(selector, context) || {}
-  return el.innerText || ''
-}
-
-const getAttribute = (val, selector, context = document) => {
-  const el = query(selector, context)
-  return el ? el.getAttribute(val) || '' : ''
-}
-
-const queryAll = (selector, context = document) => {
-  return [].slice.apply(context.querySelectorAll(selector))
-}
-
-const noop = (func, defaultFunc) => {
-  return typeof func === 'function' ? func : typeof defaultFunc === 'function' ? defaultFunc : () => {}
-}
-
-const encodeUrlData = (data) => {
-  let body = ''
-  for (let key in data) {
-    body += key + '=' + encodeURIComponent(data[key]) + '&'
-  }
-  return body.slice(0, -1)
-}
-
-const encodeOptionsData = (options) => {
-  if (options.stringify !== false && typeof options.data === 'object') {
-    options.data = encodeUrlData(options.data)
-  }
-  return options
-}
-
-const sendMessage = (options, onsuccess, onerror, retry) => {
-  if (isExtension) {
-    retry = isNaN(retry) ? 3 : +retry
-    encodeOptionsData(options)
-    chrome.runtime.sendMessage(options, ([error, response, headers, xhr]) => {
-      if (!error) {
-        try {
-          const result = noop(onsuccess)(response, headers, xhr)
-          if (result === void 0) {
-            return response
-          }
-          // onsuccess返回值不为undefined, 视为调用失败
-          error = result
-        } catch (err) {
-          // 执行onsuccess代码出错
-          error = err
-        }
-      }
-      if (retry-- > 0) {
-        sendMessage(options, onsuccess, onerror, retry)
-      } else {
-        noop(onerror)(error, headers, xhr)
-      }
-    })
-  }
-}
-
-const formatDate = (str, t) => {
-  t = typeof t === 'string' || !isNaN(t) ? new Date(t) : t
-  if (t instanceof Date === false) {
-    t = new Date()
-  }
-  const obj = {
-    yyyyyyyy: t.getFullYear(),
-    yy: t.getFullYear(),
-    MM: t.getMonth()+1,
-    dd: t.getDate(),
-    HH: t.getHours(),
-    hh: t.getHours() % 12,
-    mm: t.getMinutes(),
-    ss: t.getSeconds(),
-    ww: '日一二三四五六'.split('')[t.getDay()]
-  };
-  return str.replace(/([a-z]+)/ig, function ($1){
-    return (obj[$1+$1] === 0 ? '0' : obj[$1+$1]) || ('0' + obj[$1]).slice(-2);
-  });
-}
 
 const setInfo = (data) => {
   data = Object.assign({
@@ -129,25 +48,6 @@ const getMarkdown = (markdownBody) => {
   //   }[s1] || s))
 }
 
-const insertAfter = (newElement, targetElement) => {
-  const parent = targetElement.parentNode
-  if(parent.lastChild === targetElement){
-    parent.appendChild(newElement)
-  }else{
-    parent.insertBefore(newElement, targetElement.nextSibling)
-  }
-}
-
-const getUrl = (prefix, link) => {
-  if (!link) return ''
-  if (/^(http|https)/.test(link)) {
-    return link
-  }
-  if (/^\/\//.test(link)) {
-    return prefix.split('//')[0] + link
-  }
-  return prefix + link
-}
 const convert = async (options, customOptions) => {
   const context = {}
   const defaultOptions = {
@@ -189,6 +89,9 @@ const convert = async (options, customOptions) => {
     return result
   }
   const markdownBody = query(selectors.body, options.context).cloneNode(true)
+  const fileName = (getText(selectors.title) || document.title)
+  const realName = fileName.replace(/[\\\/\?<>:'\*\|]/g, '_')
+  noop(hook.extract)(context, { markdownBody, fileName, realName })
   queryAll(selectors.copyBtn, markdownBody).map(item => item.parentElement.removeChild(item))
   queryAll('[data-id]', markdownBody).map(item => item.removeAttribute('data-id'))
   if (selectors.invalid) {
@@ -214,9 +117,17 @@ const convert = async (options, customOptions) => {
     })
   }
   const urls = []
-  const fileName = (getText(selectors.title) || document.title)
-  const realName = fileName.replace(/[\\\/\?<>:'\*\|]/g, '_')
   const files = queryAll('img', markdownBody).map(item => {
+    const downloadName = item.getAttribute('downloadName')
+    const downloadUrl = item.getAttribute('downloadUrl')
+    if (downloadName && downloadUrl) {
+      item.src = './' + downloadName
+      options.urls !== false && urls.push(downloadUrl)
+      return {
+        name: downloadName,
+        downloadUrl
+      }
+    }
     const src = item.getAttribute(options.lazyKey) || item.src
     const url = src.replace(/\?$/, '')
     const ext = getExt(url)
@@ -235,11 +146,12 @@ const convert = async (options, customOptions) => {
     home: getUrl(location.origin, getAttribute('href', selectors.userLink)),
     description: markdownBody.innerText.replace(/^([\n\s]+)/g, '').replace(/\n/g, ' ').slice(0, 50) + '...',
   })
-  noop(hook.extract)(context)
   const markdwonDoc = html2markdown(info + getMarkdown(markdownBody), {})
+  const copyright = '> 当前文档由 [markdown文档下载插件](https://github.com/kscript/markdown-download) 下载, 原文链接: [' + fileName + '](' + location.href + ')  '
+  const content = await noop(hook.formatContent)(context, { markdownBody, markdwonDoc })
   files.push({
     name: realName + '.md',
-    content:  markdwonDoc + '\n\n' + '> 当前文档由 [markdown文档下载插件](https://github.com/kscript/markdown-download) 下载, 原文链接: [' + fileName + '](' + location.href + ')  '
+    content:  (content && typeof content === 'string' ? content: markdwonDoc )+ '\n\n' + copyright
   })
   files.push({
     name: realName + '/urls',
@@ -259,19 +171,17 @@ const extract = async (options, customOptions) => {
   return datas
 }
 
-if (isBroswer) {
-  if (isExtension) {
-    chrome.runtime.onMessage.addListener(async (message, sender, sendResponse) => {
-      if (message instanceof Object) {
-        if (message.type === 'download') {
-          if (typeof websites[message.website] === 'function') {
-            await websites[message.website](extract)
-          }
+if (isExtension) {
+  chrome.runtime.onMessage.addListener(async (message, sender, sendResponse) => {
+    if (message instanceof Object) {
+      if (message.type === 'download') {
+        if (typeof websites[message.website] === 'function') {
+          await websites[message.website](extract)
         }
       }
-      sendResponse('')
-    })
-  }
+    }
+    sendResponse('')
+  })
 }
 
 export default convert
\ No newline at end of file
diff --git a/src/utils.js b/src/utils.js
new file mode 100644
index 0000000..3049401
--- /dev/null
+++ b/src/utils.js
@@ -0,0 +1,131 @@
+import path from 'path-browserify'
+
+export const isBroswer = typeof window !== 'undefined' && window instanceof Object
+export const isExtension = isBroswer && window.chrome instanceof Object && window.chrome.runtime
+export const getExt = (fileName) => {
+  return path.parse(fileName).ext.slice(1)
+}
+export const query = (selector, context = document) => {
+  if (selector instanceof NodeList || selector instanceof Node) {
+    return selector
+  }
+  return context.querySelector(selector)
+}
+export const getText = (selector, context = document) => {
+  const el = query(selector, context) || {}
+  return el.innerText || ''
+}
+export const getAttribute = (val, selector, context = document) => {
+  const el = query(selector, context)
+  return el ? el.getAttribute(val) || '' : ''
+}
+export const queryAll = (selector, context = document) => {
+  return [].slice.apply(context.querySelectorAll(selector))
+}
+export const noop = (func, defaultFunc) => {
+  return typeof func === 'function' ? func : typeof defaultFunc === 'function' ? defaultFunc : () => {}
+}
+export const encodeUrlData = (data) => {
+  let body = ''
+  for (let key in data) {
+    body += key + '=' + encodeURIComponent(data[key]) + '&'
+  }
+  return body.slice(0, -1)
+}
+export const encodeOptionsData = (options) => {
+  if (options.stringify !== false && typeof options.data === 'object') {
+    options.data = encodeUrlData(options.data)
+  }
+  return options
+}
+export const sendMessage = (options, onsuccess, onerror, retry) => {
+  if (isExtension) {
+    retry = isNaN(retry) ? 3 : +retry
+    encodeOptionsData(options)
+    chrome.runtime.sendMessage(options, ([error, response, headers, xhr]) => {
+      if (!error) {
+        try {
+          const result = noop(onsuccess)(response, headers, xhr)
+          if (result === void 0) {
+            return response
+          }
+          // onsuccess返回值不为undefined, 视为调用失败
+          error = result
+        } catch (err) {
+          // 执行onsuccess代码出错
+          error = err
+        }
+      }
+      if (retry-- > 0) {
+        sendMessage(options, onsuccess, onerror, retry)
+      } else {
+        noop(onerror)(error, headers, xhr)
+      }
+    })
+  }
+}
+export const formatDate = (str, t) => {
+  t = typeof t === 'string' || !isNaN(t) ? new Date(t) : t
+  if (t instanceof Date === false) {
+    t = new Date()
+  }
+  const obj = {
+    yyyyyyyy: t.getFullYear(),
+    yy: t.getFullYear(),
+    MM: t.getMonth()+1,
+    dd: t.getDate(),
+    HH: t.getHours(),
+    hh: t.getHours() % 12,
+    mm: t.getMinutes(),
+    ss: t.getSeconds(),
+    ww: '日一二三四五六'.split('')[t.getDay()]
+  };
+  return str.replace(/([a-z]+)/ig, function ($1){
+    return (obj[$1+$1] === 0 ? '0' : obj[$1+$1]) || ('0' + obj[$1]).slice(-2);
+  });
+}
+export const insertAfter = (newElement, targetElement) => {
+  const parent = targetElement.parentNode
+  if(parent.lastChild === targetElement){
+    parent.appendChild(newElement)
+  }else{
+    parent.insertBefore(newElement, targetElement.nextSibling)
+  }
+}
+export const getUrl = (prefix, link) => {
+  if (!link) return ''
+  if (/^(http|https)/.test(link)) {
+    return link
+  }
+  if (/^\/\//.test(link)) {
+    return prefix.split('//')[0] + link
+  }
+  return prefix + link
+}
+export const tex2svg = (markdwonDoc) => {
+  return markdwonDoc.replace(/<ztext>(.*?)<\/ztext>/g, (s, s1) => {
+    const tex = decodeURIComponent(s1)
+    const svg = MathJax.tex2svg(tex)
+    svg.setAttribute('data-tex', tex)
+    svg.style.display = 'inline'
+    return svg.outerHTML
+  })
+}
+
+export default {
+  isBroswer,
+  isExtension,
+  getExt,
+  query,
+  getText,
+  getAttribute,
+  queryAll,
+  noop,
+  encodeUrlData,
+  encodeOptionsData,
+  sendMessage,
+  formatDate,
+  insertAfter,
+  getUrl,
+  tex2svg
+}
\ No newline at end of file
diff --git a/src/websites/jianshu.js b/src/websites/jianshu.js
index 0ed0227..db66e33 100644
--- a/src/websites/jianshu.js
+++ b/src/websites/jianshu.js
@@ -1,3 +1,4 @@
+import md5 from 'md5'
 export const hosts = ['www.jianshu.com', 'jianshu.com']
 
 export const options = {
@@ -7,7 +8,7 @@ export const options = {
   code: false,
   selectors: {
     title: 'section+h1',
-    body: 'header+div article',
+    body: 'header+div article,.post .article',
     copyBtn: '.VJbwyy',
     userName: '._3U4Smb ._1OhGeD',
     userLink: '._3U4Smb ._1OhGeD',
@@ -16,7 +17,16 @@ export const options = {
   }
 }
 
-export const hook = {}
+export const hook = {
+  extract (context, { markdownBody, realName }) {
+    markdownBody.querySelectorAll('.math-block,.math-inline').forEach(item => {
+      const ext = 'svg'
+      const name = realName + '/' + md5(item.src) + (ext ? '.' + ext : '')
+      item.setAttribute('downloadName', name)
+      item.setAttribute('downloadUrl', item.src)
+    })
+  }
+}
 
 export const config = {
   hosts,
diff --git a/src/websites/juejin.js b/src/websites/juejin.js
index f0b9411..7a70f3e 100644
--- a/src/websites/juejin.js
+++ b/src/websites/juejin.js
@@ -1,3 +1,4 @@
+import md5 from 'md5'
 export const hosts = ['juejin.im', 'juejin.cn']
 
 export const options = {
@@ -19,7 +20,18 @@ export const options = {
   }
 }
 
-export const hook = {}
+export const hook = {
+  extract (context, { markdownBody, realName }) {
+    markdownBody.querySelectorAll('img').forEach(item => {
+      if (typeof item.src === 'string' && /\/equation\?tex=/.test(item.src)) {
+        const ext = 'svg'
+        const name = realName + '/' + md5(item.src) + (ext ? '.' + ext : '')
+        item.setAttribute('downloadName', name)
+        item.setAttribute('downloadUrl', item.src)
+      }
+    })
+  }
+}
 
 export const config = {
   hosts,
diff --git a/src/websites/zhihu.js b/src/websites/zhihu.js
index c17a6ac..d13a00b 100644
--- a/src/websites/zhihu.js
+++ b/src/websites/zhihu.js
@@ -1,3 +1,4 @@
+import { tex2svg } from '../utils'
 export const hosts = ['zhuanlan.zhihu.com']
 
 export const options = {
@@ -5,18 +6,30 @@ export const options = {
   link: false,
   br: true,
   code: false,
+  lazyKey: 'data-original',
   selectors: {
     title: '.Post-Title',
     body: '.Post-RichText',
     copyBtn: '.copy-code-btn',
-    userName: '.AuthorInfo-name .Popover .UserLink-link',
-    userLink: '.AuthorInfo-name .Popover .UserLink-link',
+    userName: '.AuthorInfo-name .UserLink-link',
+    userLink: '.AuthorInfo-name .UserLink-link',
     invalid: 'noscript,.ZVideoLinkCard-author',
     unpack: 'p,figure'
   }
 }
 
-export const hook = {}
+export const hook = {
+  extract (context, { markdownBody }) {
+    markdownBody.querySelectorAll('.ztext-math').forEach(item => {
+      const ztext = document.createElement('ztext')
+      ztext.innerText = encodeURIComponent(item.getAttribute('data-tex'))
+      item.parentElement.replaceChild(ztext, item)
+    })
+  },
+  formatContent (context, { markdwonDoc }) {
+    return tex2svg(markdwonDoc)
+  }
+}
 
 export const config = {
   hosts,