diff --git a/README.md b/README.md
index 01e57c56..5ddf55aa 100644
--- a/README.md
+++ b/README.md
@@ -107,6 +107,12 @@ BASE_PATH=/MyBlogDoc/ pnpm preview
 
 离线搜索在页面加载后利用空闲时间自动准备完整索引与所需静态资源，不显示下载按钮。后台任务使用低优先级请求，搜索输入、隐藏标签页、节省流量和慢速网络会让任务延后。准备完成后，可以断网搜索新关键词、筛选和分页；已访问的文章可离线阅读。后台更新失败保留原完整缓存，缓存只属于当前博客路径。[方案比较、构建与验收说明](docs/offline-search.md)。
 
+## 公众号与文章评论
+
+中文界面的首页、文章末尾和联系页提供「泯泷ML」公众号关注卡；社交栏、页脚和手机菜单提供入口。二维码使用原图，支持微信扫码、保存图片和复制公众号名称。公众号名称与图片路径统一维护在 `src/config/site.ts`。
+
+公开且非空的文章使用 [Giscus](https://giscus.app/) 接入本仓库的 GitHub Discussions，访客使用 GitHub 登录留言，无需配置 Token。中英文界面按文章源路径共享讨论，评论区按需加载并跟随明暗主题；评论服务失败时可以重试或前往 GitHub 交流。[配置和映射说明](docs/comments.md)。
+
 ## SEO 与 GEO
 
 站点输出 Blog、Person、BlogPosting 和可见面包屑对应的 JSON-LD，补齐 OG/Twitter 分享图、可信发布时间与更新时间、原文作者与来源信息，以及 sitemap 的 lastmod。未知的发布时间不会用构建时间补造。英文界面共享原文，因此文章语言标注遵循正文语言。
diff --git a/docs/comments.md b/docs/comments.md
new file mode 100644
index 00000000..6fe1d54d
--- /dev/null
+++ b/docs/comments.md
@@ -0,0 +1,25 @@
+# GitHub Discussions 评论
+
+文章评论使用 [Giscus](https://giscus.app/)，数据保存在公开仓库 `MoMeak9/MyBlogDoc` 的 GitHub Discussions 中。访客通过 GitHub 登录留言，不需要在博客中配置 GitHub Token。
+
+## 启用
+
+1. 在仓库 **Settings → General → Features** 开启 **Discussions**。
+2. 安装 [Giscus GitHub App](https://github.com/apps/giscus)，允许它访问 `MyBlogDoc`。
+3. 选择 **Announcements** 类型的讨论分类，并将真实的分类名和 GraphQL 分类 ID 写入 `src/config/site.ts` 的 `comments` 配置。仓库 ID 已填入真实值；分类 ID 为空时保留 GitHub 交流入口，不请求 Giscus。
+
+读取仓库与分类 ID：
+
+```sh
+gh api graphql -f query='query { repository(owner:"MoMeak9", name:"MyBlogDoc") { id discussionCategories(first:25) { nodes { id name slug } } } }'
+```
+
+启用后运行 `pnpm check`、`pnpm build`、`pnpm test:build`，将构建部署到站点。浏览器需要访问 `giscus.app`，登录需要 GitHub；博客本身没有评论服务器。
+
+## 映射与行为
+
+- 只在公开且非空的文章页面显示评论，位置在正文和公众号关注卡之后，不进入文章搜索索引。
+- 使用 `specific` 映射，讨论标识为 Markdown 文章的 `post.id`；中英文界面、项目部署前缀与自定义域名共享同一讨论。修改文章标题不会改变讨论；移动文章源文件会改变标识，需要单独迁移已有讨论。
+- `strict` 开启，避免相似文章名匹配到其他讨论。尚无评论时的 `Discussion not found` 是正常状态，首次留言或表情会由 Giscus 创建讨论。
+- 接近评论区时才加载；明暗主题切换时同步 iframe。加载失败提供重试与 GitHub 交流入口，收到当前 iframe 的讨论元数据后将入口指向对应线程。
+- GitHub App 安装状态不能仅凭博客构建判断；需在部署后的页面核验评论显示与 GitHub 登录，且不要把未实际提交的评论描述为已验证。
diff --git a/public/images/wechat-ml-qr.jpg b/public/images/wechat-ml-qr.jpg
new file mode 100644
index 00000000..e17876c8
Binary files /dev/null and b/public/images/wechat-ml-qr.jpg differ
diff --git a/src/components/ArticlePage.astro b/src/components/ArticlePage.astro
index eb4e6ef6..bf8568e2 100644
--- a/src/components/ArticlePage.astro
+++ b/src/components/ArticlePage.astro
@@ -3,6 +3,8 @@ import BaseLayout from "../layouts/BaseLayout.astro";
 import PostCard from "./PostCard.astro";
 import Icon from "./Icon.astro";
 import Diagrams from "./Diagrams.astro";
+import WeChatFollow from "./WeChatFollow.astro";
+import Comments from "./Comments.astro";
 import { ui, dateLabel, type Locale } from "../i18n";
 import { getPosts, renderPost, type Post } from "../lib/content";
 import { localePath, normalizeBase, postPath } from "../lib/paths.mjs";
@@ -163,6 +165,8 @@ const editUrl = `https://github.com/MoMeak9/MyBlogDoc/edit/main/src/${post.id.sp
           </ul>
         </aside>
       )}
+      {locale === "zh" && <WeChatFollow compact />}
+      {post.indexable && !post.empty && <Comments postId={post.id} locale={locale} />}
     </div>
     {toc.length > 0 && (
       <aside class="toc">
diff --git a/src/components/Comments.astro b/src/components/Comments.astro
new file mode 100644
index 00000000..5e1e0695
--- /dev/null
+++ b/src/components/Comments.astro
@@ -0,0 +1,171 @@
+---
+import { site } from "../config/site";
+import { type Locale } from "../i18n";
+import Icon from "./Icon.astro";
+
+interface Props {
+  postId: string;
+  locale?: Locale;
+}
+const { postId, locale = "zh" } = Astro.props;
+const english = locale === "en";
+const enabled = Boolean(site.comments.repoId && site.comments.categoryId);
+const t = english
+  ? {
+      heading: "Join the conversation",
+      description: "Sign in with GitHub to comment. Both language versions share this conversation.",
+      github: "Discuss on GitHub",
+      load: "Load comments",
+      loading: "Loading comments…",
+      failed: "Comments could not be loaded. Retry or continue on GitHub.",
+      retry: "Retry loading comments",
+      unavailable: "Comments are not available yet.",
+    }
+  : {
+      heading: "一起聊聊",
+      description: "使用 GitHub 登录后即可留言，中英文界面共享同一篇文章的讨论。",
+      github: "前往 GitHub 交流",
+      load: "加载评论",
+      loading: "正在加载评论…",
+      failed: "评论暂时无法加载，可重试或前往 GitHub 交流。",
+      retry: "重试加载评论",
+      unavailable: "评论区暂未开放。",
+    };
+const discussionUrl = enabled
+  ? `${site.repositoryUrl}/discussions?discussions_q=${encodeURIComponent(`"${postId}"`)}`
+  : site.repositoryUrl;
+---
+
+<section
+  id="comments"
+  class="article-comments"
+  aria-labelledby="comments-heading"
+  data-pagefind-ignore
+  data-comments-enabled={String(enabled)}
+  data-repo={site.comments.repo}
+  data-repo-id={site.comments.repoId}
+  data-category={site.comments.category}
+  data-category-id={site.comments.categoryId}
+  data-term={postId}
+  data-lang={english ? "en" : "zh-CN"}
+  data-loading={t.loading}
+  data-failed={t.failed}
+  data-retry={t.retry}
+>
+  <div class="comments-heading">
+    <h2 id="comments-heading">{t.heading}</h2>
+    <a href={discussionUrl} target="_blank" rel="noopener noreferrer">
+      {t.github}<Icon name="github" size={16} />
+    </a>
+  </div>
+  <p class="comments-description">{t.description}</p>
+  <p class="comments-status" role="status" aria-live="polite">
+    {enabled ? "" : t.unavailable}
+  </p>
+  {enabled && <button class="button button-outline" type="button" data-load-comments>{t.load}</button>}
+  <div class="giscus"></div>
+</section>
+
+<script>
+  const section = document.querySelector<HTMLElement>('[data-comments-enabled="true"]');
+  if (section) {
+    const container = section.querySelector<HTMLElement>(".giscus")!;
+    const status = section.querySelector<HTMLElement>(".comments-status")!;
+    const button = section.querySelector<HTMLButtonElement>("[data-load-comments]")!;
+    const origin = "https://giscus.app";
+    let state: "idle" | "loading" | "ready" | "failed" = "idle";
+    let timeout: ReturnType<typeof setTimeout>;
+    let script: HTMLScriptElement | undefined;
+    const frame = () => container.querySelector<HTMLIFrameElement>("iframe.giscus-frame");
+    const theme = () => document.documentElement.classList.contains("dark") ? "dark" : "light";
+    const syncTheme = () => frame()?.contentWindow?.postMessage({ giscus: { setConfig: { theme: theme() } } }, origin);
+
+    const fail = () => {
+      clearTimeout(timeout);
+      state = "failed";
+      script?.remove();
+      container.replaceChildren();
+      status.textContent = section.dataset.failed!;
+      button.textContent = section.dataset.retry!;
+      button.hidden = false;
+    };
+    const load = () => {
+      if (state === "loading" || state === "ready") return;
+      state = "loading";
+      status.textContent = section.dataset.loading!;
+      button.hidden = true;
+      script = document.createElement("script");
+      script.src = `${origin}/client.js`;
+      script.async = true;
+      script.crossOrigin = "anonymous";
+      Object.assign(script.dataset, {
+        repo: section.dataset.repo,
+        repoId: section.dataset.repoId,
+        category: section.dataset.category,
+        categoryId: section.dataset.categoryId,
+        mapping: "specific",
+        term: section.dataset.term,
+        strict: "1",
+        reactionsEnabled: "1",
+        emitMetadata: "1",
+        inputPosition: "top",
+        theme: theme(),
+        lang: section.dataset.lang,
+        loading: "lazy",
+      });
+      script.addEventListener("error", fail, { once: true });
+      timeout = setTimeout(fail, 15000);
+      container.appendChild(script);
+    };
+    button.addEventListener("click", load);
+    if ("IntersectionObserver" in window) {
+      const observer = new IntersectionObserver((entries) => {
+        if (!entries.some((entry) => entry.isIntersecting)) return;
+        observer.disconnect();
+        load();
+      }, { rootMargin: "200px 0px" });
+      observer.observe(section);
+    } else {
+      load();
+    }
+    new MutationObserver(syncTheme).observe(document.documentElement, { attributes: true, attributeFilter: ["class"] });
+    new MutationObserver(() => frame()?.addEventListener("load", syncTheme, { once: true })).observe(container, { childList: true });
+    window.addEventListener("message", (event) => {
+      if (event.origin !== origin || !frame() || event.source !== frame()!.contentWindow) return;
+      const payload = event.data?.giscus;
+      if (!payload || typeof payload !== "object") return;
+      if (typeof payload.error === "string" && !payload.error.includes("Discussion not found")) {
+        fail();
+        return;
+      }
+      if (typeof payload.resizeHeight === "number" && payload.resizeHeight > 0) {
+        clearTimeout(timeout);
+        state = "ready";
+        status.textContent = "";
+        button.hidden = true;
+      }
+      if (payload.discussion?.url) {
+        try {
+          const url = new URL(payload.discussion.url);
+          if (url.origin === "https://github.com" && url.pathname.startsWith(`/${section.dataset.repo}/discussions/`)) {
+            section.querySelector<HTMLAnchorElement>(".comments-heading a")!.href = url.href;
+          }
+        } catch {}
+      }
+    });
+  }
+</script>
+
+<style>
+  .article-comments { margin-top: 48px; border-top: 1px solid var(--border); padding-top: 32px; min-width: 0; }
+  .comments-heading { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
+  .comments-heading h2 { font-size: 28px; }
+  .comments-heading a { display: inline-flex; align-items: center; gap: 8px; min-height: 44px; color: var(--muted); font-size: 13px; }
+  .comments-heading a:focus-visible, .article-comments button:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
+  .comments-description, .comments-status { color: var(--muted); font-size: 13px; margin-top: 12px; }
+  .comments-status:empty { display: none; }
+  .article-comments button { margin-top: 16px; }
+  .article-comments button[hidden] { display: none; }
+  .giscus { margin-top: 24px; }
+  @media (max-width: 767px) { .comments-heading { gap: 8px; } .comments-heading h2 { font-size: 24px; } }
+</style>
diff --git a/src/components/ContactPage.astro b/src/components/ContactPage.astro
index ba426c75..0e3e455e 100644
--- a/src/components/ContactPage.astro
+++ b/src/components/ContactPage.astro
@@ -1,6 +1,7 @@
 ---
 import BaseLayout from "../layouts/BaseLayout.astro";
 import Icon from "./Icon.astro";
+import WeChatFollow from "./WeChatFollow.astro";
 import { site } from "../config/site";
 import { ui, type Locale } from "../i18n";
 interface Props {
@@ -19,6 +20,11 @@ const t = ui(locale);
     </div>
   </section>
   <div class="container contact-grid">
+    {locale === "zh" && (
+      <div class="wechat-contact">
+        <WeChatFollow id="wechat" />
+      </div>
+    )}
     <div class="contact-card">
       <span class="section-label">01 / {t.email}</span>
       <h2>{t.emailTitle}</h2>
@@ -78,3 +84,7 @@ const t = ui(locale);
     </div>
   </div>
 </BaseLayout>
+
+<style>
+  .wechat-contact { grid-column: 1 / -1; min-width: 0; }
+</style>
diff --git a/src/components/HomePage.astro b/src/components/HomePage.astro
index ccf7105c..6b225f81 100644
--- a/src/components/HomePage.astro
+++ b/src/components/HomePage.astro
@@ -4,6 +4,7 @@ import PostCard from "./PostCard.astro";
 import Icon from "./Icon.astro";
 import HeroArtwork from "./HeroArtwork.astro";
 import SocialLinks from "./SocialLinks.astro";
+import WeChatFollow from "./WeChatFollow.astro";
 import { ui, type Locale } from "../i18n";
 import { getPosts } from "../lib/content";
 import { localePath, normalizeBase } from "../lib/paths.mjs";
@@ -223,6 +224,13 @@ const principles = [
       </div>
     </div>
   </section>
+  {locale === "zh" && (
+    <section class="section wechat-section">
+      <div class="container">
+        <WeChatFollow />
+      </div>
+    </section>
+  )}
   <section class="cta-section">
     <div class="container cta-inner" data-animate="fade-up">
       <div>
diff --git a/src/components/Icon.astro b/src/components/Icon.astro
index c6dbf169..a1698473 100644
--- a/src/components/Icon.astro
+++ b/src/components/Icon.astro
@@ -10,6 +10,7 @@ interface Props {
     | "rss"
     | "github"
     | "email"
+    | "wechat"
     | "bilibili";
   size?: number;
 }
@@ -26,6 +27,8 @@ const paths = {
     "M9 19c-4 1-4-2-6-2m12 5v-3.4a3 3 0 0 0-.8-2.3c2.7-.3 5.5-1.3 5.5-6A4.7 4.7 0 0 0 18.4 7a4.3 4.3 0 0 0-.1-3.2s-1-.3-3.3 1.2a11.6 11.6 0 0 0-6 0C6.7 3.5 5.7 3.8 5.7 3.8A4.3 4.3 0 0 0 5.6 7a4.7 4.7 0 0 0-1.3 3.3c0 4.7 2.8 5.7 5.5 6a3 3 0 0 0-.8 2.3V22",
   email:
     "M3 7l9 6 9-6M5 5h14a2 2 0 0 1 2 2v10a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V7a2 2 0 0 1 2-2Z",
+  wechat:
+    "M14 13.5c0 3-2.7 5.5-6 5.5H5l-3 2 1-3c-1.2-1-2-2.6-2-4.5C1 10.5 3.7 8 7 8s7 2.5 7 5.5ZM11 8c.6-2.3 2.9-4 5.5-4C20.1 4 23 6.5 23 9.5c0 1.6-.7 3.1-1.9 4.1L22 17l-3-2h-2",
   bilibili:
     "m8 3 3 3m5-3-3 3M5 6h14a2 2 0 0 1 2 2v10a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2ZM8 11v3m8-3v3m-6 3h4",
 };
diff --git a/src/components/SocialLinks.astro b/src/components/SocialLinks.astro
index 03156001..95927cd1 100644
--- a/src/components/SocialLinks.astro
+++ b/src/components/SocialLinks.astro
@@ -2,6 +2,7 @@
 import Icon from "./Icon.astro";
 import { site } from "../config/site";
 import { ui, type Locale } from "../i18n";
+import { localePath, normalizeBase } from "../lib/paths.mjs";
 
 interface Props {
   locale?: Locale;
@@ -10,6 +11,7 @@ interface Props {
 }
 const { locale = "zh", variant = "icons", class: className } = Astro.props;
 const t = ui(locale);
+const wechatHref = `${localePath("contact", "zh", normalizeBase(import.meta.env.BASE_URL))}#wechat`;
 ---
 
 <div
@@ -17,6 +19,17 @@ const t = ui(locale);
   role="group"
   aria-label={t.socialLinks}
 >
+  {locale === "zh" && (
+    <a
+      class="social-link social-link--wechat"
+      href={wechatHref}
+      aria-label={`关注微信公众号：${site.wechat.name}`}
+      title={`关注微信公众号：${site.wechat.name}`}
+    >
+      <Icon name="wechat" size={18} />
+      <span>公众号</span>
+    </a>
+  )}
   {Object.values(site.socials).map((social) => (
     <a
       class="social-link"
@@ -65,6 +78,14 @@ const t = ui(locale);
     width: 40px;
     height: 40px;
   }
+  .social-links--icons .social-link--wechat {
+    width: auto;
+    min-width: 96px;
+    gap: 8px;
+    padding-inline: 12px;
+    font-size: 13px;
+    color: var(--text);
+  }
   .social-links--text {
     gap: 10px;
   }
@@ -88,6 +109,9 @@ const t = ui(locale);
       width: 44px;
       height: 44px;
     }
+    .social-links--icons .social-link--wechat {
+      width: auto;
+    }
     .social-links--text .social-link {
       min-height: 44px;
     }
diff --git a/src/components/WeChatFollow.astro b/src/components/WeChatFollow.astro
new file mode 100644
index 00000000..c64ef478
--- /dev/null
+++ b/src/components/WeChatFollow.astro
@@ -0,0 +1,107 @@
+---
+import { site } from "../config/site";
+import Icon from "./Icon.astro";
+import { normalizeBase } from "../lib/paths.mjs";
+
+interface Props {
+  id?: string;
+  compact?: boolean;
+}
+const { id, compact = false } = Astro.props;
+const qrImage = `${normalizeBase(import.meta.env.BASE_URL)}${site.wechat.qrImage}`;
+---
+
+<section
+  id={id}
+  class:list={["wechat-follow", { "wechat-follow--compact": compact }]}
+  aria-label={`关注微信公众号：${site.wechat.name}`}
+  data-pagefind-ignore
+>
+  <div class="wechat-copy">
+    <p class="wechat-label"><Icon name="wechat" size={20} /> 微信公众号</p>
+    <h2>在微信里，继续阅读。</h2>
+    <p class="wechat-description">关注「{site.wechat.name}」，一起交流技术与思考。</p>
+    <p class="wechat-instructions">用微信扫一扫；手机上可长按识别，或保存二维码后从微信相册扫码。</p>
+  </div>
+  <div class="wechat-actions">
+    <img
+      class="wechat-qr"
+      src={qrImage}
+      alt="微信公众号「泯泷ML」关注二维码"
+      width="430"
+      height="430"
+      loading="lazy"
+      decoding="async"
+    />
+    <a class="wechat-save" href={qrImage} download="泯泷ML-公众号二维码.jpg">保存二维码</a>
+    <p class="wechat-account">{site.wechat.name}</p>
+    <button class="button" type="button" data-copy-wechat={site.wechat.name}>
+      复制公众号名称
+    </button>
+    <p class="wechat-status" role="status" aria-live="polite" aria-atomic="true">
+      也可在微信「搜一搜 → 公众号」中搜索名称。
+    </p>
+  </div>
+</section>
+
+<script>
+  document.querySelectorAll<HTMLButtonElement>("[data-copy-wechat]").forEach((button) => {
+    let resetTimer: ReturnType<typeof setTimeout>;
+    button.addEventListener("click", async () => {
+      const name = button.dataset.copyWechat;
+      const status = button.closest(".wechat-follow")?.querySelector<HTMLElement>(".wechat-status");
+      if (!name || !status) return;
+      clearTimeout(resetTimer);
+      try {
+        await navigator.clipboard.writeText(name);
+        button.textContent = "已复制";
+        status.textContent = "已复制，去微信搜一搜并选择「公众号」。";
+        resetTimer = setTimeout(() => { button.textContent = "复制公众号名称"; }, 3000);
+      } catch {
+        button.textContent = "复制公众号名称";
+        status.textContent = `请长按或选中「${name}」手动复制，再到微信搜索。`;
+      }
+    });
+  });
+</script>
+
+<style>
+  .wechat-follow {
+    display: grid;
+    grid-template-columns: minmax(0, 1fr) minmax(180px, auto);
+    align-items: center;
+    gap: 40px;
+    padding: 40px;
+    border: 1px solid var(--border);
+    background: var(--surface);
+    text-align: left;
+    scroll-margin-top: calc(var(--header-height) + 24px);
+  }
+  .wechat-copy, .wechat-actions { min-width: 0; }
+  .wechat-label {
+    display: flex;
+    align-items: center;
+    gap: 10px;
+    color: var(--accent);
+    font-size: 12px;
+    letter-spacing: .12em;
+  }
+  h2 { font-size: clamp(24px, 3vw, 36px); margin: 18px 0 16px; }
+  .wechat-description { color: var(--text); font-size: 16px; }
+  .wechat-instructions { margin-top: 12px; color: var(--muted); font-size: 13px; }
+  .wechat-actions { max-width: 240px; text-align: center; }
+  .wechat-qr { width: 215px; max-width: 100%; height: auto; margin: 0 auto; background: #fff; color-scheme: light; }
+  .wechat-save { display: inline-flex; align-items: center; min-height: 44px; font-size: 12px; color: var(--muted); }
+  .wechat-save:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
+  .wechat-account { font-size: 28px; margin-bottom: 16px; font-weight: 500; user-select: all; }
+  .wechat-actions .button { width: 100%; letter-spacing: 0; }
+  .wechat-actions .button:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
+  .wechat-status { min-height: 44px; margin-top: 12px; font-size: 12px; color: var(--muted); }
+  .wechat-follow--compact { margin-top: 36px; padding: 28px; gap: 24px; }
+  .wechat-follow--compact h2 { font-size: 24px; }
+  @media (max-width: 767px) {
+    .wechat-follow { grid-template-columns: minmax(0, 1fr); padding: 24px; gap: 24px; }
+    .wechat-actions { max-width: none; }
+    .wechat-status { min-height: 0; }
+  }
+</style>
diff --git a/src/config/site.ts b/src/config/site.ts
index c592f015..e8d9e65c 100644
--- a/src/config/site.ts
+++ b/src/config/site.ts
@@ -5,6 +5,16 @@ export const site = {
     displayName: { zh: "泯泷 Yihui", en: "Yihui" },
   },
   repositoryUrl: "https://github.com/MoMeak9/MyBlogDoc",
+  wechat: {
+    name: "泯泷ML",
+    qrImage: "images/wechat-ml-qr.jpg",
+  },
+  comments: {
+    repo: "MoMeak9/MyBlogDoc",
+    repoId: "R_kgDOG_ZV7A",
+    category: "Announcements",
+    categoryId: "DIC_kwDOG_ZV7M4DHZRJ",
+  },
   socials: {
     github: {
       icon: "github",
diff --git a/tests/build.test.mjs b/tests/build.test.mjs
index 571519d6..c19d0a17 100644
--- a/tests/build.test.mjs
+++ b/tests/build.test.mjs
@@ -165,6 +165,60 @@ function locations(xml) {
   );
 }
 
+test("WeChat follow cards serve the original QR under the deployment base and only in Chinese", () => {
+  const qrPath = "images/wechat-ml-qr.jpg";
+  assert.deepEqual(
+    readFileSync(join(dist, qrPath)),
+    readFileSync(join(root, "public", qrPath)),
+    "The QR image must be published without modification.",
+  );
+  for (const page of regularPages) {
+    const html = artifact(page.file);
+    const qrTags = [...html.matchAll(/<img\b[^>]*>/g)]
+      .map(([tag]) => attributes(tag))
+      .filter((attrs) => attrs.class?.includes("wechat-qr"));
+    if (page.locale === "en") {
+      assert.equal(qrTags.length, 0, page.file);
+      assert.ok(!html.includes('class="social-link social-link--wechat"'), page.file);
+    } else if (["", "contact"].includes(page.route) || page.id) {
+      assert.equal(qrTags.length, 1, page.file);
+      assert.equal(qrTags[0].src, `${base}${qrPath}`, page.file);
+      assert.equal(qrTags[0].width, "430");
+      assert.equal(qrTags[0].height, "430");
+      assert.ok(html.includes('download="泯泷ML-公众号二维码.jpg"'), page.file);
+    }
+  }
+});
+
+test("public article comments share a discussion identity across locales and remain outside indexed prose", () => {
+  for (const article of contentIndex().articles) {
+    for (const locale of ["zh", "en"]) {
+      const file = join(locale === "en" ? "en" : "", "posts", article.id, "index.html");
+      const html = artifact(file);
+      const sections = [...html.matchAll(/<section\b[^>]*>/g)]
+        .map(([tag]) => ({ tag, attrs: attributes(tag) }))
+        .filter(({ attrs }) => attrs.id === "comments");
+      assert.equal(sections.length, 1, file);
+      const { tag, attrs } = sections[0];
+      assert.equal(attrs["data-term"], article.id, file);
+      assert.equal(attrs["data-lang"], locale === "en" ? "en" : "zh-CN", file);
+      assert.equal(attrs["data-repo"], "MoMeak9/MyBlogDoc", file);
+      assert.match(tag, /\bdata-pagefind-ignore\b/, file);
+      if (attrs["data-comments-enabled"] === "true") {
+        assert.ok(attrs["data-repo-id"] && attrs["data-category-id"], file);
+      } else {
+        assert.ok(!html.includes("data-load-comments"), file);
+      }
+      const prose = html.match(/<article\b[^>]*class="prose"[\s\S]*?<\/article>/)?.[0];
+      assert.ok(prose, file);
+      assert.ok(!prose.includes('id="comments"'), file);
+    }
+  }
+  for (const path of ["index.html", "contact/index.html", "en/index.html", "en/contact/index.html"]) {
+    assert.ok(!artifact(path).includes('id="comments"'), path);
+  }
+});
+
 test("every Markdown article has both locale pages and a real legacy HTML entry", (t) => {
   assert.ok(
     notes.includes("README.md") && notes.includes("个人简介.md"),