diff --git a/ui/src/components/markdown-parser.ts b/ui/src/components/markdown-parser.ts
index 3a603673a45b..75af77b68a3b 100644
--- a/ui/src/components/markdown-parser.ts
+++ b/ui/src/components/markdown-parser.ts
@@ -1,5 +1,6 @@
 import { asOptionalRecord } from "@openclaw/normalization-core/record-coerce";
 import MarkdownIt, { type MarkdownIt as MarkdownItParser, type Token } from "markdown-it";
+import markdownItCjkFriendly from "markdown-it-cjk-friendly";
 import markdownItTaskLists from "markdown-it-task-lists";
 import { t } from "../i18n/index.ts";
 import { fileKindForPath, shortestFileLabels } from "./file-kind.ts";
@@ -147,6 +148,7 @@ export function createMarkdownParser(): MarkdownItParser {
     breaks: true,
     linkify: true,
   });
+  markdownParser.use(markdownItCjkFriendly);
   const defaultCodeInlineRenderer = markdownParser.renderer.rules.code_inline!;
 
   // Enable GFM strikethrough (~~text~~) to match original marked.js behavior.
diff --git a/ui/src/e2e/chat-markdown-alignment.e2e.test.ts b/ui/src/e2e/chat-markdown-alignment.e2e.test.ts
index b1978794a5be..f91efc181a20 100644
--- a/ui/src/e2e/chat-markdown-alignment.e2e.test.ts
+++ b/ui/src/e2e/chat-markdown-alignment.e2e.test.ts
@@ -26,6 +26,10 @@ suite.define(() => {
                   text: [
                     "## Alignment check",
                     "",
+                    "これは**（注記）**です",
+                    "",
+                    'safe<br>break and unsafe<br class="wide">markup',
+                    "",
                     "- Bullet item",
                     "",
                     "1. Numbered item",
@@ -56,6 +60,9 @@ suite.define(() => {
           hasText: "Alignment check",
         });
         await markdown.waitFor();
+        expect(await markdown.locator("strong", { hasText: "（注記）" }).count()).toBe(1);
+        expect(await markdown.locator("br").count()).toBe(1);
+        expect(await markdown.textContent()).toContain('unsafe<br class="wide">markup');
 
         const geometry = await markdown.evaluate((root) => {
           const textRect = (selector: string) => {