diff --git a/app/app/application/base.py b/app/app/application/base.py
index 0f7bafa..f5197da 100644
--- a/app/app/application/base.py
+++ b/app/app/application/base.py
@@ -58,7 +58,7 @@ def complete_app_span(self, app_spans):
             for tag_str in [
                     "x_request_id_0", "x_request_id_1", "auto_instance_0",
                     "auto_instance_1", "subnet_0", "app_service",
-                    "_tsdb_region_name", "process_kname_0",
+                    "_querier_region", "process_kname_0",
                     "http_proxy_client", "auto_instance_1_node_type",
                     "app_instance", "response_exception", "version",
                     "l7_protocol_str", "auto_instance_0_node_type",
diff --git a/app/app/application/l7_flow_tracing.py b/app/app/application/l7_flow_tracing.py
index 48c0482..d806a41 100644
--- a/app/app/application/l7_flow_tracing.py
+++ b/app/app/application/l7_flow_tracing.py
@@ -1886,6 +1886,8 @@ def sort_all_flows(dataframe_flows: DataFrame, network_delay_us: int,
         if merge_flow(flows, flow):  # 合并单向Flow为会话
             continue
         flow['_index'] = len(flows)  # assert '_index' not in flow
+        flow['_querier_region'] = dict_flows['_querier_region'][
+            index]  # set _querier_region for multi-region
         flows.append(flow)
     # 注意：不要对 flows 再做排序，下面的代码会通过 flows[flow_index] 来反查 flow
 
@@ -2798,7 +2800,9 @@ def _get_flow_dict(flow: DataFrame):
         "tap_id":
         flow.get("tap_id", None),
         "tap":
-        flow.get("tap", None)
+        flow.get("tap", None),
+        "_querier_region":
+        flow.get("_querier_region", None)
     }
     if flow["signal_source"] == L7_FLOW_SIGNAL_SOURCE_EBPF:
         flow_dict["subnet"] = flow.get("subnet")
diff --git a/app/app/data/querier_client.py b/app/app/data/querier_client.py
index 62efbe0..2691fc6 100644
--- a/app/app/data/querier_client.py
+++ b/app/app/data/querier_client.py
@@ -76,7 +76,7 @@ async def exec(self):
                     'columns'):
                 result_df = self.to_dataframe(result_dict)
                 if self.region is not None:
-                    result_df['_tsdb_region_name'] = self.region
+                    result_df['_querier_region'] = self.region
                 if self.query_id is not None:
                     result_df['query_id'] = self.query_id
             if status != 200: