diff --git a/run_service_backend.py b/run_service_backend.py
index 2d9ae71..7fbd198 100644
--- a/run_service_backend.py
+++ b/run_service_backend.py
@@ -110,12 +110,14 @@ def data_retrieve_thread():
 def skland_sign_in_thread():
     try:
         last_run = None
+        next_run_time = random_time(480, 720)
         while 1:
             if not ark_back.is_retrieving_data:
                 break
             time.sleep(20)
             now = datetime.datetime.now()
-            if now.strftime('%H:%M') == random_time(480, 720) and last_run != now.date():
+            if now.strftime('%H:%M') == next_run_time and last_run != now.date():
+                next_run_time = random_time(480, 720)
                 ark_back.skland_sign_new()
                 last_run = now.date()
     except Exception as e:
@@ -127,7 +129,6 @@ def skland_sign_in_thread():
 
 
 if __name__ == '__main__':
-    send_batch_email(['2654988228@qq.com'], 'test mail', 'test111')
     print('start')
     logger = LoggerClass().get_log(logging.INFO)
     ark_back = ArkHelperBackend(logger=logger)