diff --git a/csst_dfs_api_cluster/msc/__init__.py b/csst_dfs_api_cluster/mbi/__init__.py
similarity index 51%
rename from csst_dfs_api_cluster/msc/__init__.py
rename to csst_dfs_api_cluster/mbi/__init__.py
index 4449958447a5338fdc8b2c69b33b7b1171229481..1c26194dc05ae73573763f232b099d04cf733073 100644
--- a/csst_dfs_api_cluster/msc/__init__.py
+++ b/csst_dfs_api_cluster/mbi/__init__.py
@@ -1,3 +1,4 @@
 from .level1 import Level1DataApi
 from .level1prc import Level1PrcApi
-from .level2 import Level2DataApi
\ No newline at end of file
+from .level2 import Level2DataApi
+from .level2co import Level2CoApi
\ No newline at end of file
diff --git a/csst_dfs_api_cluster/msc/level1.py b/csst_dfs_api_cluster/mbi/level1.py
similarity index 99%
rename from csst_dfs_api_cluster/msc/level1.py
rename to csst_dfs_api_cluster/mbi/level1.py
index 6d579937888b5eaf4fc7f8b932e1c18f73296dee..a069cac2eea0ebca46e0d1a9dd216b4b3aa54144 100644
--- a/csst_dfs_api_cluster/msc/level1.py
+++ b/csst_dfs_api_cluster/mbi/level1.py
@@ -93,7 +93,7 @@ class Level1DataApi(object):
                 return Result.error(message=f"data not found")  
 
             return Result.ok_data(data = Level1Record().from_proto_model(resp.record))
-           
+
         except grpc.RpcError as e:
             return Result.error(message="%s:%s" % (e.code().value, e.details()))   
 
@@ -143,7 +143,7 @@ class Level1DataApi(object):
 
     def write(self, **kwargs):
         ''' insert a level1 record into database
- 
+
         parameter kwargs:
             level0_id : [str]
             data_type : [str]
diff --git a/csst_dfs_api_cluster/msc/level1prc.py b/csst_dfs_api_cluster/mbi/level1prc.py
similarity index 100%
rename from csst_dfs_api_cluster/msc/level1prc.py
rename to csst_dfs_api_cluster/mbi/level1prc.py
diff --git a/csst_dfs_api_cluster/msc/level2.py b/csst_dfs_api_cluster/mbi/level2.py
similarity index 100%
rename from csst_dfs_api_cluster/msc/level2.py
rename to csst_dfs_api_cluster/mbi/level2.py
diff --git a/csst_dfs_api_cluster/msc/level2co.py b/csst_dfs_api_cluster/mbi/level2co.py
similarity index 100%
rename from csst_dfs_api_cluster/msc/level2co.py
rename to csst_dfs_api_cluster/mbi/level2co.py