diff --git a/packages/ui-default/backendlib/markdown-it-media.js b/packages/ui-default/backendlib/markdown-it-media.ts
similarity index 63%
rename from packages/ui-default/backendlib/markdown-it-media.js
rename to packages/ui-default/backendlib/markdown-it-media.ts
index 57193b8e5..591c1e063 100644
--- a/packages/ui-default/backendlib/markdown-it-media.js
+++ b/packages/ui-default/backendlib/markdown-it-media.ts
@@ -1,38 +1,39 @@
 /* eslint-disable max-len */
 /* eslint-disable prefer-destructuring */
 
-const { randomUUID } = require('crypto');
-const { escapeHtml } = require('markdown-it/lib/common/utils');
+import { randomUUID } from 'crypto';
+import MarkdownIt from 'markdown-it';
+
+const allowFullScreen = ' webkitallowfullscreen mozallowfullscreen allowfullscreen';
 
-/* eslint-disable no-restricted-properties */
 const ytRegex = /^.*((youtu.be\/)|(v\/)|(\/u\/\w\/)|(embed\/)|(watch\?))\??v?=?([^#&?]*).*/;
-function youtubeParser(url) {
+function youtubeParser(url: string) {
   const match = url.match(ytRegex);
   return match && match[7].length === 11 ? match[7] : url;
 }
 const vimeoRegex = /https?:\/\/(?:www\.|player\.)?vimeo.com\/(?:channels\/(?:\w+\/)?|groups\/([^/]*)\/videos\/|album\/(\d+)\/video\/|)(\d+)(?:$|\/|\?)/;
-function vimeoParser(url) {
+function vimeoParser(url: string) {
   const match = url.match(vimeoRegex);
   return match && typeof match[3] === 'string' ? match[3] : url;
 }
 const vineRegex = /^http(?:s?):\/\/(?:www\.)?vine\.co\/v\/([a-zA-Z0-9]{1,13}).*/;
-function vineParser(url) {
+function vineParser(url: string) {
   const match = url.match(vineRegex);
   return match && match[1].length === 11 ? match[1] : url;
 }
 const preziRegex = /^https:\/\/prezi.com\/(.[^/]+)/;
-function preziParser(url) {
+function preziParser(url: string) {
   const match = url.match(preziRegex);
   return match ? match[1] : url;
 }
 // TODO: Write regex for staging and local servers.
 const mfrRegex = /^http(?:s?):\/\/(?:www\.)?mfr\.osf\.io\/render\?url=http(?:s?):\/\/osf\.io\/([a-zA-Z0-9]{1,5})\/\?action=download/;
-function mfrParser(url) {
+function mfrParser(url: string) {
   const match = url.match(mfrRegex);
   return match ? match[1] : url;
 }
 const EMBED_REGEX = /@\[([a-zA-Z].+?)]\((.*?)[)]/im;
-function extractVideoParameters(url) {
+function extractVideoParameters(url: string) {
   const parameterMap = new Map();
   const params = url.replace(/&/gi, '&').split(/[#?&]/);
   if (params.length > 1) {
@@ -43,7 +44,7 @@ function extractVideoParameters(url) {
   }
   return parameterMap;
 }
-function videoUrl(service, videoID, url, options) {
+function resourceUrl(service: string, src: string, url: string, options) {
   if (service === 'youtube') {
     const parameters = extractVideoParameters(url);
     if (options.youtube.parameters) {
@@ -57,7 +58,7 @@ function videoUrl(service, videoID, url, options) {
       const timeParts = timeParameter.match(/[0-9]+/g);
       let j = 0;
       while (timeParts.length > 0) {
-        startTime += Number(timeParts.pop()) * Math.pow(60, j);
+        startTime += Number(timeParts.pop()) * (60 ** j);
         j += 1;
       }
       parameters.set('start', startTime);
@@ -67,58 +68,68 @@ function videoUrl(service, videoID, url, options) {
     parameters.delete('feature');
     parameters.delete('origin');
     const parameterArray = Array.from(parameters, (p) => p.join('='));
-    const parameterPos = videoID.indexOf('?');
+    const parameterPos = src.indexOf('?');
     let finalUrl = 'https://www.youtube';
     if (options.youtube.nocookie || url.indexOf('youtube-nocookie.com') > -1) finalUrl += '-nocookie';
-    finalUrl += `.com/embed/${parameterPos > -1 ? videoID.substr(0, parameterPos) : videoID}`;
+    finalUrl += `.com/embed/${parameterPos > -1 ? src.substr(0, parameterPos) : src}`;
     if (parameterArray.length > 0) finalUrl += `?${parameterArray.join('&')}`;
     return finalUrl;
   }
-  if (service === 'vimeo') return `https://player.vimeo.com/video/${videoID}`;
-  if (service === 'vine') return `https://vine.co/v/${videoID}/embed/${options.vine.embed}`;
+  if (service === 'vimeo') return `https://player.vimeo.com/video/${src}`;
+  if (service === 'vine') return `https://vine.co/v/${src}/embed/${options.vine.embed}`;
   if (service === 'prezi') {
-    return `https://prezi.com/embed/${videoID}/?bgcolor=ffffff&lock_to_path=0&autoplay=0&autohide_ctrls=0&`
+    return `https://prezi.com/embed/${src}/?bgcolor=ffffff&lock_to_path=0&autoplay=0&autohide_ctrls=0&`
       + 'landing_data=bHVZZmNaNDBIWnNjdEVENDRhZDFNZGNIUE43MHdLNWpsdFJLb2ZHanI5N1lQVHkxSHFxazZ0UUNCRHloSXZROHh3PT0&'
       + 'landing_sign=1kD6c0N6aYpMUS0wxnQjxzSqZlEB8qNFdxtdjYhwSuI';
   }
-  if (service === 'osf') return `https://mfr.osf.io/render?url=https://osf.io/${videoID}/?action=download`;
-  return videoID;
+  if (service === 'osf') return `https://mfr.osf.io/render?url=https://osf.io/${src}/?action=download`;
+  return src;
 }
 
-module.exports = function videoPlugin(md) {
+// eslint-disable-next-line import/prefer-default-export
+export function Media(md: MarkdownIt) {
   const options = {
-    url: videoUrl,
-    video: videoUrl,
+    url: resourceUrl,
+    video: resourceUrl,
     youtube: { width: 640, height: 390, nocookie: false },
     vimeo: { width: 500, height: 281 },
     vine: { width: 600, height: 600, embed: 'simple' },
     prezi: { width: 550, height: 400 },
     osf: { width: '100%', height: '100%' },
-    pdf: videoUrl,
+    pdf: resourceUrl,
   };
   md.renderer.rules.video = function tokenizeReturn(tokens, idx) {
-    let videoID = md.utils.escapeHtml(tokens[idx].videoID);
-    const service = md.utils.escapeHtml(tokens[idx].service).toLowerCase();
+    let src = md.utils.escapeHtml(tokens[idx].attrGet('src'));
+    const service = md.utils.escapeHtml(tokens[idx].attrGet('service')).toLowerCase();
     const checkUrl = /http(?:s?):\/\/(?:www\.)?[a-zA-Z0-9-:.]{1,}\/render(?:\/)?[a-zA-Z0-9.&;?=:%]{1,}url=http(?:s?):\/\/[a-zA-Z0-9 -:.]{1,}\/[a-zA-Z0-9]{1,5}\/\?[a-zA-Z0-9.=:%]{1,}/;
     let num;
-    if (service === 'osf' && videoID) {
+    if (service === 'osf' && src) {
       num = Math.random() * 0x10000;
-      if (videoID.match(checkUrl)) {
+      if (src.match(checkUrl)) {
         return `<div id="${num}" class="mfr mfr-file"></div><script>`
-          + `$(document).ready(function () {new mfr.Render("${num}", "${videoID}");`
+          + `$(document).ready(function () {new mfr.Render("${num}", "${src}");`
           + '    }); </script>';
       }
       return `<div id="${num}" class="mfr mfr-file"></div><script>`
         + `$(document).ready(function () {new mfr.Render("${num}", "https://mfr.osf.io/`
-        + `render?url=https://osf.io/${videoID}/?action=download%26mode=render");`
+        + `render?url=https://osf.io/${src}/?action=download%26mode=render");`
         + '    }); </script>';
     }
+    if (service === 'bilibili') {
+      if (src.startsWith('http')) src = src.split('/').pop();
+      if (src.toLowerCase().startsWith('av')) src = src.toLowerCase().split('av')[1];
+      src = src.split('?')[0];
+      return `\
+        <iframe src="//player.bilibili.com/player.html?${src.startsWith('BV') ? 'bvid' : 'aid'}=${src}"
+          scrolling="no" border="0" frameborder="no" framespacing="0" width="100%" style="min-height:500px" ${allowFullScreen}></iframe>
+      `;
+    }
     if (service === 'pdf') {
-      if (videoID.startsWith('file://')) videoID += videoID.includes('?') ? '&noDisposition=1' : '?noDisposition=1';
+      if (src.startsWith('file://')) src += src.includes('?') ? '&noDisposition=1' : '?noDisposition=1';
       return `\
         <object classid="clsid:${randomUUID().toUpperCase()}">
-          <param name="SRC" value="${videoID}" >
-          <embed width="100%" style="min-height: 100vh;border: none;" fullscreen="yes" src="${videoID}">
+          <param name="SRC" value="${src}" >
+          <embed width="100%" style="min-height: 100vh;border: none;" fullscreen="yes" src="${src}">
             <noembed></noembed>
           </embed>
         </object>`;
@@ -126,7 +137,7 @@ module.exports = function videoPlugin(md) {
     if (['url', 'video'].includes(service)) {
       return `\
         <video width="100%" controls>
-          <source src="${videoID}" type="${videoID.endsWith('ogg') ? 'video/ogg' : 'video/mp4'}">
+          <source src="${src}" type="${src.endsWith('ogg') ? 'video/ogg' : 'video/mp4'}">
           Your browser doesn't support video tag.
         </video>`;
     }
@@ -134,14 +145,12 @@ module.exports = function videoPlugin(md) {
       return `<div class="embed-responsive embed-responsive-16by9">
       <iframe class="embed-responsive-item ${service}-player" type="text/html" width="${options[service].width || 640}"\
         height="${options[service].height || 390}"\
-        src="${options.url(service, videoID, tokens[idx].url, options)}"
-        frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe></div>`;
+        src="${options.url(service, src, tokens[idx].attrGet('url'), options)}"
+        frameborder="0"${allowFullScreen}></iframe></div>`;
     }
-    return `<div data-${service}>${escapeHtml(videoID)}</div>`;
+    return `<div data-${service}>${md.utils.escapeHtml(src)}</div>`;
   };
   md.inline.ruler.before('emphasis', 'video', (state, silent) => {
-    let token;
-    let videoID;
     const theState = state;
     const oldPos = state.pos;
     if (state.src.charCodeAt(oldPos) !== 0x40
@@ -150,29 +159,26 @@ module.exports = function videoPlugin(md) {
     }
     const match = EMBED_REGEX.exec(state.src.slice(state.pos, state.src.length));
     if (!match || match.length < 3) return false;
-    const service = match[1];
-    videoID = match[2];
-    const serviceLower = service.toLowerCase();
-    if (serviceLower === 'youtube') videoID = youtubeParser(videoID);
-    else if (serviceLower === 'vimeo') videoID = vimeoParser(videoID);
-    else if (serviceLower === 'vine') videoID = vineParser(videoID);
-    else if (serviceLower === 'prezi') videoID = preziParser(videoID);
-    else if (serviceLower === 'osf') videoID = mfrParser(videoID);
-    if (videoID === ')') videoID = '';
+    let [, service, src] = match;
+    service = service.toLowerCase();
+    if (service === 'youtube') src = youtubeParser(src);
+    else if (service === 'vimeo') src = vimeoParser(src);
+    else if (service === 'vine') src = vineParser(src);
+    else if (service === 'prezi') src = preziParser(src);
+    else if (service === 'osf') src = mfrParser(src);
+    if (src === ')') src = '';
     const serviceStart = oldPos + 2;
-    const serviceEnd = md.helpers.parseLinkLabel(state, oldPos + 1, false);
     if (!silent) {
       theState.pos = serviceStart;
-      theState.service = theState.src.slice(serviceStart, serviceEnd);
       const newState = new theState.md.inline.State(service, theState.md, theState.env, []);
       newState.md.inline.tokenize(newState);
-      token = theState.push('video', '');
-      token.videoID = videoID;
-      token.service = service;
-      token.url = match[2];
+      const token = theState.push('video', '', undefined);
+      token.attrPush(['src', src]);
+      token.attrPush(['service', service]);
+      token.attrPush(['url', match[2]]);
       token.level = theState.level;
     }
     theState.pos += theState.src.indexOf(')', theState.pos);
     return true;
   });
-};
+}
diff --git a/packages/ui-default/backendlib/markdown.js b/packages/ui-default/backendlib/markdown.js
index 8351c1e04..e9098ef4b 100644
--- a/packages/ui-default/backendlib/markdown.js
+++ b/packages/ui-default/backendlib/markdown.js
@@ -22,7 +22,7 @@ const MergeCells = require('markdown-it-merge-cells');
 // @[url](videourl)
 // @[youtube](https://youtube.com/watch?v=xxx)
 // @[pdf](https://foo.com/bar.pdf)
-const Media = require('./markdown-it-media');
+const { Media } = require('./markdown-it-media');
 const Katex = require('./markdown-it-katex');
 const { xssProtector } = require('./markdown-it-xss');
 
diff --git a/packages/ui-default/package.json b/packages/ui-default/package.json
index 7d0d7f6ee..24977b727 100644
--- a/packages/ui-default/package.json
+++ b/packages/ui-default/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hydrooj/ui-default",
-  "version": "4.37.9",
+  "version": "4.37.10",
   "author": "undefined <i@undefined.moe>",
   "license": "AGPL-3.0",
   "main": "hydro.js",
@@ -24,6 +24,7 @@
     "@types/jquery": "^3.5.14",
     "@types/json-schema": "^7.0.11",
     "@types/katex": "^0.14.0",
+    "@types/markdown-it": "^12.2.3",
     "@types/qrcode": "^1.4.2",
     "@types/react-dom": "^18.0.4",
     "@types/redux-logger": "^3.0.9",