diff --git a/components/layout/AppLayout.tsx b/components/layout/AppLayout.tsx
index a2b80f4..9ec9b02 100644
--- a/components/layout/AppLayout.tsx
+++ b/components/layout/AppLayout.tsx
@@ -17,8 +17,10 @@ import {
   useComputedColorScheme,
   useMantineColorScheme,
 } from "@mantine/core"
+import Avvvatars from "avvvatars-react"
+
 import { useDisclosure, useMediaQuery } from "@mantine/hooks"
-import { IconLogout, IconMoon, IconSun, IconUser } from "@tabler/icons-react"
+import { IconLogout, IconMoon, IconSun } from "@tabler/icons-react"
 import cx from "clsx"
 import { Suspense, useEffect, useMemo, useState } from "react"
 import actionToggleClasses from "./ActionToggle.module.css"
@@ -33,6 +35,103 @@ import { ClientIcon } from "./components/ClientIcon"
 import { LinksGroup } from "./components/NavbarLinks"
 import { useAppLayoutStore } from "./store"
 
+const COMPOUND_SURNAMES = new Set([
+  "欧阳",
+  "太史",
+  "端木",
+  "上官",
+  "司马",
+  "东方",
+  "独孤",
+  "南宫",
+  "万俟",
+  "闻人",
+  "夏侯",
+  "诸葛",
+  "尉迟",
+  "公羊",
+  "赫连",
+  "澹台",
+  "皇甫",
+  "宗政",
+  "濮阳",
+  "公冶",
+  "太叔",
+  "申屠",
+  "公孙",
+  "慕容",
+  "仲孙",
+  "钟离",
+  "长孙",
+  "宇文",
+  "司徒",
+  "鲜于",
+  "司空",
+  "闾丘",
+  "子车",
+  "亓官",
+  "司寇",
+  "巫马",
+  "公西",
+  "颛孙",
+  "壤驷",
+  "公良",
+  "漆雕",
+  "乐正",
+  "宰父",
+  "谷梁",
+  "拓跋",
+  "轩辕",
+  "令狐",
+  "段干",
+  "百里",
+  "呼延",
+  "东郭",
+  "南门",
+  "羊舌",
+  "微生",
+  "梁丘",
+  "左丘",
+  "东门",
+  "西门",
+  "南荣",
+  "第五",
+])
+
+function isChineseName(value: string) {
+  return /[\u4e00-\u9fff]/.test(value)
+}
+
+function getAvatarDisplayValue(rawValue?: string | null) {
+  const value = rawValue?.trim() ?? ""
+
+  if (!value) return "-"
+
+  if (isChineseName(value)) {
+    const normalized = value.replace(/[\s·•･・]/g, "")
+    if (normalized.length <= 1) return normalized
+
+    const surnameLength =
+      normalized.length >= 3 && COMPOUND_SURNAMES.has(normalized.slice(0, 2))
+        ? 2
+        : 1
+    const givenName = normalized.slice(surnameLength)
+
+    if (!givenName) return normalized.slice(-1)
+    if (givenName.length <= 2) return givenName
+    return givenName.slice(-2)
+  }
+
+  const tokens = value.split(/[\s-_]+/).filter(Boolean)
+  if (tokens.length >= 2) {
+    return `${tokens[0][0] ?? ""}${tokens[tokens.length - 1][0] ?? ""}`
+      .trim()
+      .toUpperCase()
+  }
+
+  return value.slice(0, 2).toUpperCase()
+}
+
 export default function AppLayout({
   menu,
   children,
@@ -144,6 +243,10 @@ export default function AppLayout({
   }
   const matches = useMediaQuery("(min-width: 48em)")
   const userName = usePermissionStore((s) => s.user_name)
+  const avatarDisplayValue = useMemo(
+    () => getAvatarDisplayValue(userName),
+    [userName]
+  )
 
   return isClient ? (
     withoutLayout ? (
@@ -199,10 +302,9 @@ export default function AppLayout({
               <Menu shadow="md" width={220}>
                 <Menu.Target>
                   <UnstyledButton>
-                    <IconUser
-                      style={{ display: "block" }}
-                      size={22}
-                      stroke={1.5}
+                    <Avvvatars
+                      value={userName || "-"}
+                      displayValue={avatarDisplayValue}
                     />
                   </UnstyledButton>
                 </Menu.Target>
diff --git a/package.json b/package.json
index d97f454..4f912fa 100644
--- a/package.json
+++ b/package.json
@@ -41,6 +41,7 @@
     "@tiptap/react": "^3.15.3",
     "@tiptap/starter-kit": "^3.15.3",
     "@tmcw/togeojson": "^7.1.2",
+    "avvvatars-react": "^0.4.2",
     "classnames": "^2.5.1",
     "clsx": "^2.1.1",
     "dayjs": "^1.11.18",