diff --git a/main.py b/main.py
index 4d978ac..b8ed421 100644
--- a/main.py
+++ b/main.py
@@ -2740,9 +2740,10 @@ async def fastapi_run_project_by_date(network: str, querydate: str) -> str:
 
         bg_start_time, bg_end_time = time_api.parse_beijing_date_range(querydate)
 
-        bg_start_time_str = bg_start_time.strftime("%Y-%m-%dT%H:%M:%SZ")
+        # convert to the format of 2024-11-25T09:00:00+08:00'
+        bg_start_time_str = bg_start_time.strftime("%Y-%m-%dT%H:%M:%S%z")
         print(f"bg_start_time_str: {bg_start_time_str}")
-        bg_end_time_str = bg_end_time.strftime("%Y-%m-%dT%H:%M:%SZ")
+        bg_end_time_str = bg_end_time.strftime("%Y-%m-%dT%H:%M:%S%z")
         print(f"bg_end_time_str: {bg_end_time_str}")
 
         result = simulation.run_simulation(name=network, simulation_type='realtime', modify_pattern_start_time=bg_start_time_str, modify_total_duration=86400)