diff --git a/_config.yml b/_config.yml
index 768562f..0c30cf3 100644
--- a/_config.yml
+++ b/_config.yml
@@ -1,3 +1,9 @@
+# ===============================================================
+# It's recommended to use Alternate Theme Config to configure the theme
+# Modifying this file may result in merge conflict
+# See: https://theme-next.js.org/docs/getting-started/configuration
+# ===============================================================
+
 # ---------------------------------------------------------------
 # Theme Core Configuration Settings
 # See: https://theme-next.js.org/docs/theme-settings/
@@ -480,9 +486,6 @@ baidu_push: false
 # See: https://theme-next.js.org/docs/third-party-services/
 # More plugins: https://github.com/next-theme/awesome-next
 # You may need to install dependencies or set CDN URLs in `vendors`
-# There are two different CDN providers by default:
-#   - jsDelivr (cdn.jsdelivr.net), works everywhere even in China
-#   - CDNJS (cdnjs.cloudflare.com), provided by cloudflare
 # ---------------------------------------------------------------
 
 # Math Formulas Render Support
@@ -857,47 +860,49 @@ canvas_ribbon:
   zIndex: -1 # The display level of the ribbon
 
 
-#! ---------------------------------------------------------------
+#! ==============================================================
 #! DO NOT EDIT THE FOLLOWING SETTINGS
 #! UNLESS YOU KNOW WHAT YOU ARE DOING
 #! See: https://theme-next.js.org/docs/advanced-settings
-#! ---------------------------------------------------------------
+#! ==============================================================
 
 # Script Vendors. Set a CDN address for the vendor you want to customize.
-# Be aware that you would better use the same version as internal ones to avoid potential problems.
+# CDN URLs from UNPKG and CDNJS are provided in the comments for selection.
+# If left blank, jsDelivr will be used as the default CDN provider.
+# It's recommended to use the same version as internal ones to avoid potential problems.
 # Remember to use the https protocol of CDN files when you enable https on your site.
 vendors:
-  # Internal path prefix.
-  _internal: lib
+  # Available values: local, jsdelivr, unpkg
+  internal: local
 
   # Internal version: 3.1.0
-  # anime: //cdn.jsdelivr.net/npm/animejs@3.1.0/lib/anime.min.js
+  # anime: //unpkg.com/animejs@3.1.0/lib/anime.min.js
   # anime: //cdnjs.cloudflare.com/ajax/libs/animejs/3.1.0/anime.min.js
   anime:
 
   # Internal version: 5.13.0
-  # fontawesome: //cdn.jsdelivr.net/npm/@fortawesome/fontawesome-free@5/css/all.min.css
+  # fontawesome: //unpkg.com/@fortawesome/fontawesome-free@5/css/all.min.css
   # fontawesome: //cdnjs.cloudflare.com/ajax/libs/font-awesome/5.13.0/css/all.min.css
   fontawesome:
 
   # Prism
-  # prism: //cdn.jsdelivr.net/npm/prismjs@1/components/prism-core.min.js
-  # prism_autoloader: //cdn.jsdelivr.net/npm/prismjs@1/plugins/autoloader/prism-autoloader.min.js
-  # prism_line_numbers: //cdn.jsdelivr.net/npm/prismjs@1/plugins/line-numbers/prism-line-numbers.min.js
+  # prism: //unpkg.com/prismjs@1/components/prism-core.min.js
+  # prism_autoloader: //unpkg.com/prismjs@1/plugins/autoloader/prism-autoloader.min.js
+  # prism_line_numbers: //unpkg.com/prismjs@1/plugins/line-numbers/prism-line-numbers.min.js
   prism:
   prism_autoloader:
   prism_line_numbers:
 
   # MathJax
-  # mathjax: //cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js
+  # mathjax: //unpkg.com/mathjax@3/es5/tex-mml-chtml.js
   # mathjax: //cdnjs.cloudflare.com/ajax/libs/mathjax/3.0.5/es5/tex-mml-chtml.js
   mathjax:
 
   # KaTeX
-  # katex: //cdn.jsdelivr.net/npm/katex@0/dist/katex.min.css
+  # katex: //unpkg.com/katex@0/dist/katex.min.css
   # katex: //cdnjs.cloudflare.com/ajax/libs/KaTeX/0.11.1/katex.min.css
-  # copy_tex_js: //cdn.jsdelivr.net/npm/katex@0/dist/contrib/copy-tex.min.js
-  # copy_tex_css: //cdn.jsdelivr.net/npm/katex@0/dist/contrib/copy-tex.min.css
+  # copy_tex_js: //unpkg.com/katex@0/dist/contrib/copy-tex.min.js
+  # copy_tex_css: //unpkg.com/katex@0/dist/contrib/copy-tex.min.css
   katex:
   copy_tex_js:
   copy_tex_css:
@@ -907,79 +912,79 @@ vendors:
   pjax:
 
   # FancyBox
-  # jquery: //cdn.jsdelivr.net/npm/jquery@3/dist/jquery.min.js
-  # fancybox: //cdn.jsdelivr.net/npm/@fancyapps/fancybox@3/dist/jquery.fancybox.min.js
-  # fancybox_css: //cdn.jsdelivr.net/npm/@fancyapps/fancybox@3/dist/jquery.fancybox.min.css
+  # jquery: //unpkg.com/jquery@3/dist/jquery.min.js
+  # fancybox: //unpkg.com/@fancyapps/fancybox@3/dist/jquery.fancybox.min.js
+  # fancybox_css: //unpkg.com/@fancyapps/fancybox@3/dist/jquery.fancybox.min.css
   jquery:
   fancybox:
   fancybox_css:
 
   # Medium-zoom
-  # mediumzoom: //cdn.jsdelivr.net/npm/medium-zoom@1/dist/medium-zoom.min.js
+  # mediumzoom: //unpkg.com/medium-zoom@1/dist/medium-zoom.min.js
   # mediumzoom: //cdnjs.cloudflare.com/ajax/libs/medium-zoom/1.0.5/medium-zoom.min.js
   mediumzoom:
 
   # Lazyload
-  # lazyload: //cdn.jsdelivr.net/npm/lozad@1/dist/lozad.min.js
+  # lazyload: //unpkg.com/lozad@1/dist/lozad.min.js
   # lazyload: //cdnjs.cloudflare.com/ajax/libs/lozad.js/1.15.0/lozad.min.js
   lazyload:
 
   # Pangu
-  # pangu: //cdn.jsdelivr.net/npm/pangu@4/dist/browser/pangu.min.js
+  # pangu: //unpkg.com/pangu@4/dist/browser/pangu.min.js
   # pangu: //cdnjs.cloudflare.com/ajax/libs/pangu/4.0.7/pangu.min.js
   pangu:
 
   # Quicklink
-  # quicklink: //cdn.jsdelivr.net/npm/quicklink@2/dist/quicklink.umd.js
+  # quicklink: //unpkg.com/quicklink@2/dist/quicklink.umd.js
   # quicklink: //cdnjs.cloudflare.com/ajax/libs/quicklink/2.0.0/quicklink.umd.js
   quicklink:
 
   # DisqusJS
-  # disqusjs_js: //cdn.jsdelivr.net/npm/disqusjs@1/dist/disqus.js
-  # disqusjs_css: //cdn.jsdelivr.net/npm/disqusjs@1/dist/disqusjs.css
+  # disqusjs_js: //unpkg.com/disqusjs@1/dist/disqus.js
+  # disqusjs_css: //unpkg.com/disqusjs@1/dist/disqusjs.css
   disqusjs_js:
   disqusjs_css:
 
   # Valine
-  # valine: //cdn.jsdelivr.net/npm/valine@1/dist/Valine.min.js
+  # valine: //unpkg.com/valine@1/dist/Valine.min.js
   # valine: //cdnjs.cloudflare.com/ajax/libs/valine/1.4.14/Valine.min.js
   valine:
 
   # Gitalk
-  # gitalk_js: //cdn.jsdelivr.net/npm/gitalk@1/dist/gitalk.min.js
-  # gitalk_css: //cdn.jsdelivr.net/npm/gitalk@1/dist/gitalk.min.css
+  # gitalk_js: //unpkg.com/gitalk@1/dist/gitalk.min.js
+  # gitalk_css: //unpkg.com/gitalk@1/dist/gitalk.min.css
   gitalk_js:
   gitalk_css:
 
   # Algolia Search
-  # algolia_search: //cdn.jsdelivr.net/npm/algoliasearch@4/dist/algoliasearch-lite.umd.js
-  # instant_search: //cdn.jsdelivr.net/npm/instantsearch.js@4/dist/instantsearch.production.min.js
+  # algolia_search: //unpkg.com/algoliasearch@4/dist/algoliasearch-lite.umd.js
+  # instant_search: //unpkg.com/instantsearch.js@4/dist/instantsearch.production.min.js
   algolia_search:
   instant_search:
 
   # Mermaid
-  # mermaid: //cdn.jsdelivr.net/npm/mermaid@8/dist/mermaid.min.js
+  # mermaid: //unpkg.com/mermaid@8/dist/mermaid.min.js
   # mermaid: //cdnjs.cloudflare.com/ajax/libs/mermaid/8.5.2/mermaid.min.js
   mermaid:
 
   # Internal version: 1.2.1
-  # velocity: //cdn.jsdelivr.net/npm/velocity-animate@1/velocity.min.js
+  # velocity: //unpkg.com/velocity-animate@1/velocity.min.js
   # velocity: //cdnjs.cloudflare.com/ajax/libs/velocity/1.2.1/velocity.min.js
-  # velocity_ui: //cdn.jsdelivr.net/npm/velocity-animate@1/velocity.ui.min.js
+  # velocity_ui: //unpkg.com/velocity-animate@1/velocity.ui.min.js
   # velocity_ui: //cdnjs.cloudflare.com/ajax/libs/velocity/1.2.1/velocity.ui.min.js
   velocity:
   velocity_ui:
 
   # Internal version: 1.0.2
-  # pace: //cdn.jsdelivr.net/npm/pace-js@1/pace.min.js
+  # pace: //unpkg.com/pace-js@1/pace.min.js
   # pace: //cdnjs.cloudflare.com/ajax/libs/pace/1.0.2/pace.min.js
-  # pace_css: //cdn.jsdelivr.net/npm/pace-js@1/themes/blue/pace-theme-minimal.min.css
+  # pace_css: //unpkg.com/pace-js@1/themes/blue/pace-theme-minimal.min.css
   # pace_css: //cdnjs.cloudflare.com/ajax/libs/pace/1.0.2/themes/blue/pace-theme-minimal.min.css
   pace:
   pace_css:
 
   # JavaScript 3D library
-  # three: //cdn.jsdelivr.net/npm/three@0/build/three.min.js
+  # three: //unpkg.com/three@0/build/three.min.js
   # three_waves: //cdn.jsdelivr.net/gh/next-theme/theme-next-three@1/three-waves.min.js
   # canvas_lines: //cdn.jsdelivr.net/gh/next-theme/theme-next-three@1/canvas_lines.min.js
   # canvas_sphere: //cdn.jsdelivr.net/gh/next-theme/theme-next-three@1/canvas_sphere.min.js
@@ -989,7 +994,7 @@ vendors:
   canvas_sphere:
 
   # Canvas ribbon
-  # canvas_ribbon: //cdn.jsdelivr.net/npm/ribbon.js@1/dist/ribbon.min.js
+  # canvas_ribbon: //unpkg.com/ribbon.js@1/dist/ribbon.min.js
   canvas_ribbon:
 
 # Assets
diff --git a/layout/_partials/head/head.njk b/layout/_partials/head/head.njk
index a5e72a1..f84d003 100644
--- a/layout/_partials/head/head.njk
+++ b/layout/_partials/head/head.njk
@@ -43,7 +43,7 @@
 
 {{ next_font() }}
 
-{%- set font_awesome_uri = theme.vendors.fontawesome or next_vendors('font-awesome/css/all.min.css') %}
+{%- set font_awesome_uri = theme.vendors.fontawesome or url_for('lib/font-awesome/css/all.min.css') %}
 <link rel="stylesheet" href="{{ font_awesome_uri }}">
 
 {%- if theme.fancybox %}
diff --git a/layout/_scripts/vendors.njk b/layout/_scripts/vendors.njk
index 3f47dee..386ece8 100644
--- a/layout/_scripts/vendors.njk
+++ b/layout/_scripts/vendors.njk
@@ -2,15 +2,15 @@
   {%- set three_uri = theme.vendors.three or '//cdn.jsdelivr.net/npm/three@0/build/three.min.js' %}
   <script defer src="{{ three_uri }}"></script>
   {%- if theme.three.three_waves %}
-    {%- set waves_uri = theme.vendors.three_waves or next_vendors('three/three-waves.min.js') %}
+    {%- set waves_uri = theme.vendors.three_waves or url_for('lib/three/three-waves.min.js') %}
     <script defer src="{{ waves_uri }}"></script>
   {%- endif %}
   {%- if theme.three.canvas_lines %}
-    {%- set lines_uri = theme.vendors.canvas_lines or next_vendors('three/canvas_lines.min.js') %}
+    {%- set lines_uri = theme.vendors.canvas_lines or url_for('lib/three/canvas_lines.min.js') %}
     <script defer src="{{ lines_uri }}"></script>
   {%- endif %}
   {%- if theme.three.canvas_sphere %}
-    {%- set sphere_uri = theme.vendors.canvas_sphere or next_vendors('three/canvas_sphere.min.js') %}
+    {%- set sphere_uri = theme.vendors.canvas_sphere or url_for('lib/three/canvas_sphere.min.js') %}
     <script defer src="{{ sphere_uri }}"></script>
   {%- endif %}
 {%- endif %}
@@ -21,6 +21,6 @@
 {%- endif %}
 
 {%- for name, internal in js_vendors() %}
-  {%- set internal_script = next_vendors(internal) %}
+  {%- set internal_script = url_for(internal) %}
   <script src="{{ theme.vendors[name] or internal_script }}"></script>
 {%- endfor %}
diff --git a/layout/_third-party/tags/pdf.njk b/layout/_third-party/tags/pdf.njk
index f4eb03e..a781105 100644
--- a/layout/_third-party/tags/pdf.njk
+++ b/layout/_third-party/tags/pdf.njk
@@ -1,5 +1,5 @@
 {%- if theme.pdf.enable %}
-{%- set pdf_uri = next_vendors('pdf/web/viewer.html') %}
+{%- set pdf_uri = url_for('lib/pdf/web/viewer.html') %}
 <script{{ pjax }}>
 document.querySelectorAll('.pdfobject-container').forEach(element => {
   let url = element.dataset.target;
diff --git a/scripts/helpers/engine.js b/scripts/helpers/engine.js
index 473a7a0..12201fe 100644
--- a/scripts/helpers/engine.js
+++ b/scripts/helpers/engine.js
@@ -10,15 +10,17 @@ hexo.extend.helper.register('next_inject', function(point) {
     .join('');
 });
 
-hexo.extend.helper.register('next_js', function(...urls) {
+hexo.extend.helper.register('next_js', function(url) {
+  const { next_version } = this;
   const { js } = this.theme;
-  return urls.map(url => this.js(`${js}/${url}`)).join('');
-});
-
-hexo.extend.helper.register('next_vendors', function(url) {
-  if (url.startsWith('//')) return url;
-  const internal = this.theme.vendors._internal;
-  return this.url_for(`${internal}/${url}`);
+  const { internal } = this.theme.vendors;
+  let src = `${js}/${url}`;
+  if (internal === 'jsdelivr') {
+    src = `//cdn.jsdelivr.net/npm/hexo-theme-next@${next_version}/source/js/${url}`;
+  } else if (internal === 'unpkg') {
+    src = `//unpkg.com/hexo-theme-next@${next_version}/source/js/${url}`;
+  }
+  return this.js(src);
 });
 
 hexo.extend.helper.register('post_edit', function(src) {
diff --git a/scripts/helpers/next-vendors.js b/scripts/helpers/next-vendors.js
index a7ca02d..a92cd84 100644
--- a/scripts/helpers/next-vendors.js
+++ b/scripts/helpers/next-vendors.js
@@ -5,7 +5,7 @@
 hexo.extend.helper.register('js_vendors', function() {
   let { config, theme } = this;
   let vendors = {
-    anime: 'anime.min.js'
+    anime: 'lib/anime.min.js'
   };
   if (config.prismjs.enable && !config.prismjs.preprocess) {
     vendors.prism = '//cdn.jsdelivr.net/npm/prismjs@1/components/prism-core.min.js';
@@ -31,8 +31,8 @@ hexo.extend.helper.register('js_vendors', function() {
     vendors.pangu = '//cdn.jsdelivr.net/npm/pangu@4/dist/browser/pangu.min.js';
   }
   if (theme.motion.enable) {
-    vendors.velocity = 'velocity/velocity.min.js';
-    vendors.velocity_ui = 'velocity/velocity.ui.min.js';
+    vendors.velocity = 'lib/velocity/velocity.min.js';
+    vendors.velocity_ui = 'lib/velocity/velocity.ui.min.js';
   }
   return vendors;
 });