diff --git a/zhixing-server/src/zhixing_server/modules/sector_radar/domain/source.py b/zhixing-server/src/zhixing_server/modules/sector_radar/domain/source.py
index 991c255..ea8d379 100644
--- a/zhixing-server/src/zhixing_server/modules/sector_radar/domain/source.py
+++ b/zhixing-server/src/zhixing_server/modules/sector_radar/domain/source.py
@@ -370,7 +370,7 @@ class SuspendRow:
 
     ts_code: str
     trade_date: date
-    suspend_timing: str
+    suspend_timing: str | None
     suspend_type: str
 
     @classmethod
@@ -382,7 +382,7 @@ class SuspendRow:
         return cls(
             ts_code=_required_text(row, "ts_code"),
             trade_date=trade_date,
-            suspend_timing=_required_text(row, "suspend_timing"),
+            suspend_timing=_optional_text(row, "suspend_timing"),
             suspend_type=_required_text(row, "suspend_type"),
         )
 
diff --git a/zhixing-server/tests/unit/sector_radar/test_normalize.py b/zhixing-server/tests/unit/sector_radar/test_normalize.py
index a70db2c..3c9859f 100644
--- a/zhixing-server/tests/unit/sector_radar/test_normalize.py
+++ b/zhixing-server/tests/unit/sector_radar/test_normalize.py
@@ -188,7 +188,7 @@ def test_stock_fact_normalization_preserves_all_missing_and_zero_states() -> Non
         SuspendRow(
             ts_code=codes[1],
             trade_date=TARGET_DATE,
-            suspend_timing="09:30",
+            suspend_timing=None,
             suspend_type="停牌",
         ),
     )
diff --git a/zhixing-server/tests/unit/sector_radar/test_tushare_source.py b/zhixing-server/tests/unit/sector_radar/test_tushare_source.py
index 55bbc50..5901ebd 100644
--- a/zhixing-server/tests/unit/sector_radar/test_tushare_source.py
+++ b/zhixing-server/tests/unit/sector_radar/test_tushare_source.py
@@ -333,6 +333,47 @@ def test_stock_basic_explicitly_requests_all_lifecycle_statuses() -> None:
     assert [call[1]["list_status"] for call in client.calls] == ["L", "D", "P", "G", "UN"]
 
 
+def test_suspend_timing_may_be_missing_while_suspend_type_remains_required() -> None:
+    client = QueryClient(
+        {
+            (
+                "suspend_d",
+                "",
+            ): (
+                {
+                    "ts_code": "000001.SZ",
+                    "trade_date": "20260828",
+                    "suspend_timing": None,
+                    "suspend_type": "S",
+                },
+            )
+        }
+    )
+
+    result = make_adapter(client).fetch_suspensions(TARGET_DATE)
+
+    assert result.rows[0].suspend_timing is None
+    assert result.rows[0].suspend_type == "S"
+
+    missing_type = QueryClient(
+        {
+            (
+                "suspend_d",
+                "",
+            ): (
+                {
+                    "ts_code": "000001.SZ",
+                    "trade_date": "20260828",
+                    "suspend_timing": None,
+                    "suspend_type": None,
+                },
+            )
+        }
+    )
+    with pytest.raises(SourceContractError, match="suspend_type must be a non-empty string"):
+        make_adapter(missing_type).fetch_suspensions(TARGET_DATE)
+
+
 def test_source_snapshot_hash_is_order_stable_and_excludes_token_params() -> None:
     first = build_source_snapshot(
         api_name="daily",