diff --git a/csst_common/data_manager.py b/csst_common/data_manager.py
index 6a00d0b27936eb1ae926936d84c78e22af707877..ecd0ba1e0c7bf740bc5b270b634d4efa90eeef59 100644
--- a/csst_common/data_manager.py
+++ b/csst_common/data_manager.py
@@ -272,8 +272,8 @@ class CsstMsDataManager:
 
         # parse info
         _telescope, _instrument, _survey, _imagetype, \
-        _exp_start, _exp_stop, _exp_id, \
-        _detector, *_l0_post, _ext = re.split(r"[_.]", fps_img[0])
+            _exp_start, _exp_stop, _exp_id, \
+            _detector, *_l0_post, _ext = re.split(r"[_.]", fps_img[0])
 
         _exp_start = int(_exp_start)
         _exp_stop = int(_exp_stop)