diff --git a/game-server/app/servers/guild/handler/cityActivityHandler.ts b/game-server/app/servers/guild/handler/cityActivityHandler.ts
index c78b1d06c..60d2d600e 100644
--- a/game-server/app/servers/guild/handler/cityActivityHandler.ts
+++ b/game-server/app/servers/guild/handler/cityActivityHandler.ts
@@ -100,7 +100,7 @@ export class CityActivityHandler {
 
         let historyCity = await getHistoryCity(roleId);
         if (historyCity) {
-            await leaveCityChannel(roleId, sid, historyCity);
+            await leaveCityChannel(roleId, sid, `${historyCity}`);
         }
         await addRoleToCityChannel(roleId, sid, cityId);
         await setHistoryCity(roleId, cityId);
diff --git a/game-server/app/services/chatChannelService.ts b/game-server/app/services/chatChannelService.ts
index 83a6e72cf..5ee113ff6 100644
--- a/game-server/app/services/chatChannelService.ts
+++ b/game-server/app/services/chatChannelService.ts
@@ -71,7 +71,7 @@ export async function leaveWorldChannel(roleId: string, sid: string, serverId: n
     await leaveChannel(roomId, roleId, sid);
 }
 
-export async function leaveCityChannel(roleId: string, sid: string, cityId: number) {
+export async function leaveCityChannel(roleId: string, sid: string, cityId: string) {
     const roomId = groupRoomId(CHANNEL_PREFIX.CITY, cityId);
     await leaveChannel(roomId, roleId, sid);
 }