diff --git a/backend/src/alphapulse/calendar/jin10_auth.py b/backend/src/alphapulse/calendar/jin10_auth.py
index af3ce0c..ede3fdf 100644
--- a/backend/src/alphapulse/calendar/jin10_auth.py
+++ b/backend/src/alphapulse/calendar/jin10_auth.py
@@ -14,6 +14,10 @@ class Jin10Error(Exception):
     pass
 
 
+class Jin10QrExpired(Jin10Error):
+    pass
+
+
 async def uc_request(path: str, params: dict | None = None, token: str | None = None) -> dict:
     headers = {**HEADERS, **({"x-token": token} if token else {})}
     try:
@@ -21,6 +25,8 @@ async def uc_request(path: str, params: dict | None = None, token: str | None =
             response = await client.get(UC_URL + path, params=params, headers=headers)
             response.raise_for_status()
             body = response.json()
+        if path == "/qrcode/try_login" and isinstance(body, dict) and body.get("status") == 400 and body.get("message") == "二维码已过期":
+            raise Jin10QrExpired("金十二维码已过期")
         if not isinstance(body, dict) or body.get("status") != 200:
             raise Jin10Error("金十未接受请求，请重新扫码或稍后重试")
         return body
@@ -48,7 +54,10 @@ def qr_image(token: str) -> str:
 
 
 async def poll_qr(token: str) -> tuple[str, str | None]:
-    body = await uc_request("/qrcode/try_login", {"token": token})
+    try:
+        body = await uc_request("/qrcode/try_login", {"token": token})
+    except Jin10QrExpired:
+        return "expired", None
     data = body.get("data")
     if data is None:
         return "pending", None
diff --git a/backend/tests/test_jin10.py b/backend/tests/test_jin10.py
index 3d77f0b..56b9973 100644
--- a/backend/tests/test_jin10.py
+++ b/backend/tests/test_jin10.py
@@ -225,3 +225,31 @@ def test_upstream_errors_never_expose_tokens(qr_env, monkeypatch):
     with pytest.raises(jin10_auth.Jin10Error, match="金十连接失败") as exc:
         asyncio.run(jin10_auth.uc_request("/qrcode/try_login", {"token": "private"}))
     assert "private" not in str(exc.value)
+
+
+@pytest.mark.parametrize("message,expired", [("二维码已过期", True), ("请求被拒绝", False)])
+def test_observed_upstream_expiry_is_not_a_generic_connection_failure(qr_env, monkeypatch, message, expired):
+    from alphapulse.calendar import jin10_auth
+    import importlib
+    jin10_auth = importlib.reload(jin10_auth)
+    response = httpx.Response(200, json={"status": 400, "message": message}, request=httpx.Request("GET", "https://uc-api.jin10.com/qrcode/try_login"))
+    monkeypatch.setattr(httpx.AsyncClient, "get", AsyncMock(return_value=response))
+    if expired:
+        assert asyncio.run(jin10_auth.poll_qr("private")) == ("expired", None)
+    else:
+        with pytest.raises(jin10_auth.Jin10Error, match="未接受请求"):
+            asyncio.run(jin10_auth.poll_qr("private"))
+
+
+def test_upstream_expiry_clears_task_without_disconnecting_existing_account(qr_env):
+    e = qr_env
+    e.authorize()
+    e.pending()
+    e.row.token_encrypted = b"existing-encrypted-credential"
+    e.upstream.poll_qr.return_value = "expired", None
+    response = request(e, "POST", "/qr/task-a/poll")
+    assert response.status_code == 200
+    assert response.json()["data"]["state"] == "expired"
+    assert e.row.token_encrypted == b"existing-encrypted-credential"
+    assert e.row.qr_encrypted is None
+    assert e.row.error is None
diff --git a/web/src/pages/settings/components/Jin10Settings.vue b/web/src/pages/settings/components/Jin10Settings.vue
index 26fdf5b..c278d35 100644
--- a/web/src/pages/settings/components/Jin10Settings.vue
+++ b/web/src/pages/settings/components/Jin10Settings.vue
@@ -135,7 +135,7 @@ watch(visible, (value) => {
       <div v-loading="busy" class="jin10-qr">
         <img v-if="qr && state === 'pending'" :src="qr.image" alt="金十登录二维码" width="240" height="240">
         <p v-if="state === 'pending'">
-          请用金十 App 扫描并确认，二维码 60 秒后失效。
+          请立即用金十 App 扫描并确认，二维码有效时间较短，失效后可刷新。
         </p>
         <p v-else-if="state === 'expired'">
           二维码已失效，请刷新后重新扫码。