diff --git a/csst_common/__init__.py b/csst_common/__init__.py
index c047f6a23f17a03c96169e58acc2be3de46183a0..6d5187581b474ec5ec302959073223953f48d612 100644
--- a/csst_common/__init__.py
+++ b/csst_common/__init__.py
@@ -1,12 +1,12 @@
 """
-Identifier:     KSC-SJ4-csst_common/__init__.py
+Identifier:     csst_common/__init__.py
 Name:           __init__.py
 Description:    csst_common package
 Author:         Bo Zhang
 Created:        2022-09-13
 Modified-History:
-    2022-09-13, Bo Zhang, created
-    2022-09-13, Bo Zhang, fixed a bug
+    2023-12-15, Bo Zhang, created
+    2023-12-15, Bo Zhang, add module header
 """
 
 from .status import CsstResult, CsstStatus
diff --git a/csst_common/ccds/__init__.py b/csst_common/ccds/__init__.py
index ad39fbc7ac53d87f31ec4d018ba786f76a096e6d..748749b6b11d6e14f7c364822efc95b0af5bd430 100644
--- a/csst_common/ccds/__init__.py
+++ b/csst_common/ccds/__init__.py
@@ -1 +1,11 @@
+"""
+Identifier:     csst_common/ccds/__init__.py
+Name:           __init__.py
+Description:    CCDS wrapper
+Author:         Bo Zhang
+Created:        2022-09-13
+Modified-History:
+    2023-12-15, Bo Zhang, created
+    2023-12-15, Bo Zhang, add CCDS wrapper
+"""
 from .ccds import CCDS
diff --git a/csst_common/ccds/ccds.py b/csst_common/ccds/ccds.py
index 5cad353b04c55b1561c5a60792d023d61892d3c9..bbee3770f9f60befccc7c24a92756c23bf559763 100644
--- a/csst_common/ccds/ccds.py
+++ b/csst_common/ccds/ccds.py
@@ -1,3 +1,13 @@
+"""
+Identifier:     csst_common/__init__.py
+Name:           __init__.py
+Description:    csst_common package
+Author:         Bo Zhang
+Created:        2022-09-13
+Modified-History:
+    2023-07-08, Bo Zhang, created
+    2023-12-15, Bo Zhang, add module header
+"""
 import functools
 import os
 
diff --git a/csst_common/ccds/slsconf.py b/csst_common/ccds/slsconf.py
index 381a0ea82951e385953048012a426898b49af8f9..0ef2de2fe7b7d31041b5bb0f127d5704dead9f58 100644
--- a/csst_common/ccds/slsconf.py
+++ b/csst_common/ccds/slsconf.py
@@ -1,9 +1,18 @@
+"""
+Identifier:     csst_common/ccds/slsconf.py
+Name:           slsconf.py
+Description:    csst_common package
+Author:         Bo Zhang
+Created:        2022-09-13
+Modified-History:
+    2023-12-15, Bo Zhang, created
+    2023-12-15, Bo Zhang, add module header
+"""
 import json
 import os
 import re
 
 import astropy.io.fits as pyfits
-
 from ccds import client
 
 
diff --git a/csst_common/decorator.py b/csst_common/decorator.py
index 39b7b088be4e499cb7c2106fd3a987c95f615368..f62dd3261175a185556dbd1f979b8e2033a4e8f2 100644
--- a/csst_common/decorator.py
+++ b/csst_common/decorator.py
@@ -1,11 +1,21 @@
+"""
+Identifier:     csst_common/decorator.py
+Name:           decorator.py
+Description:    module wrapper
+Author:         Bo Zhang
+Created:        2022-09-13
+Modified-History:
+    2023-12-15, Bo Zhang, created
+    2023-12-15, Bo Zhang, add module header
+"""
 import functools
 import logging
 import time
 import traceback
 from typing import Callable, NamedTuple, Optional
 
-from csst_common.status import CsstResult, CsstStatus
 from csst_common.logger import get_logger
+from csst_common.status import CsstResult, CsstStatus
 
 __all__ = ["ModuleResult", "parameterized_module_decorator"]
 
diff --git a/csst_common/file.py b/csst_common/file.py
index df0414be41c2935a21049e18013965f175949c4b..cd639d695a139600d0d681ea7f5a26263927d250 100644
--- a/csst_common/file.py
+++ b/csst_common/file.py
@@ -1,3 +1,15 @@
+"""
+Identifier:     csst_common/__init__.py
+Name:           __init__.py
+Description:    csst_common package
+Author:         Bo Zhang
+Created:        2023-12-13
+Modified-History:
+    2023-12-13, Bo Zhang, created
+    2023-12-13, Bo Zhang, add File
+    2023-12-15, Bo Zhang, use re to match file name
+    2023-12-15, Bo Zhang, add module header
+"""
 import os
 import re
 from typing import Optional
diff --git a/csst_common/time.py b/csst_common/time.py
index 7c14655bc04d19d3ed0c183a16c1e574a8c02374..4585138d6fa0fa418f14ec3a2be8bdc43ef36457 100644
--- a/csst_common/time.py
+++ b/csst_common/time.py
@@ -1,11 +1,21 @@
+"""
+Identifier:     csst_common/time.py
+Name:           time.py
+Description:    time module
+Author:         Bo Zhang
+Created:        2023-03-09
+Modified-History:
+    2023-03-09, Bo Zhang, created
+    2023-03-09, Bo Zhang, add two time formats
+"""
 import datetime
 
 
 def now():
-    """ Return ISOT8601 format datetime, for time stamps in data products. """
-    return datetime.datetime.now().strftime('%Y-%m-%dT%H:%M:%S.%f')
+    """Return ISOT8601 format datetime, for time stamps in data products."""
+    return datetime.datetime.now().strftime("%Y-%m-%dT%H:%M:%S.%f")
 
 
 def now_dfs():
-    """ Return ISOT8601 format datetime, for DFS usage only. """
-    return datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S')
+    """Return ISOT8601 format datetime, for DFS usage only."""
+    return datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")
diff --git a/csst_common/utils/tempfile.py b/csst_common/utils/tempfile.py
index cfcb4930bf41b190d4f266063c1579f9308cda3d..f49b88df306dbb7f8bbdc3be8b7a2e4e61a405f5 100644
--- a/csst_common/utils/tempfile.py
+++ b/csst_common/utils/tempfile.py
@@ -1,3 +1,4 @@
+
 import secrets
 import string
 
diff --git a/tests/test_status.py b/tests/test_status.py
index 6966f60e3d869bbe5bb190373b2c4e813bf5ae3d..b7efd612b9452875257aca11b9c8d7541e08b923 100644
--- a/tests/test_status.py
+++ b/tests/test_status.py
@@ -1,3 +1,13 @@
+"""
+Identifier:     tests/test_status.py
+Name:           test_status.py
+Description:    test CsstStatus
+Author:         Bo Zhang
+Created:        2022-09-13
+Modified-History:
+    2022-09-13, Bo Zhang, created
+    2022-09-13, Bo Zhang, added CsstMbiDataManager
+"""
 import unittest
 from csst_common.status import CsstStatus