diff --git a/modelscope/hub/api.py b/modelscope/hub/api.py
index f4f31280..d102219b 100644
--- a/modelscope/hub/api.py
+++ b/modelscope/hub/api.py
@@ -1,4 +1,3 @@
-import imp
 import os
 import pickle
 import subprocess
diff --git a/modelscope/hub/constants.py b/modelscope/hub/constants.py
index a38f9afb..08f7c31d 100644
--- a/modelscope/hub/constants.py
+++ b/modelscope/hub/constants.py
@@ -6,3 +6,16 @@ DEFAULT_MODELSCOPE_GROUP = 'damo'
 MODEL_ID_SEPARATOR = '/'
 
 LOGGER_NAME = 'ModelScopeHub'
+
+
+class Licenses(object):
+    APACHE_V2 = 'Apache License 2.0'
+    GPL = 'GPL'
+    LGPL = 'LGPL'
+    MIT = 'MIT'
+
+
+class ModelVisibility(object):
+    PRIVATE = 1
+    INTERNAL = 3
+    PUBLIC = 5
diff --git a/modelscope/models/base.py b/modelscope/models/base.py
index cb6d2b0e..40929a21 100644
--- a/modelscope/models/base.py
+++ b/modelscope/models/base.py
@@ -2,7 +2,7 @@
 
 import os.path as osp
 from abc import ABC, abstractmethod
-from typing import Dict, Union
+from typing import Dict, Optional, Union
 
 from modelscope.hub.snapshot_download import snapshot_download
 from modelscope.models.builder import build_model
@@ -42,13 +42,18 @@ class Model(ABC):
         return input
 
     @classmethod
-    def from_pretrained(cls, model_name_or_path: str, *model_args, **kwargs):
-        """ Instantiate a model from local directory or remote model repo
+    def from_pretrained(cls,
+                        model_name_or_path: str,
+                        revision: Optional[str] = 'master',
+                        *model_args,
+                        **kwargs):
+        """ Instantiate a model from local directory or remote model repo. Note
+        that when loading from remote, the model revision can be specified.
         """
         if osp.exists(model_name_or_path):
             local_model_dir = model_name_or_path
         else:
-            local_model_dir = snapshot_download(model_name_or_path)
+            local_model_dir = snapshot_download(model_name_or_path, revision)
         logger.info(f'initialize model from {local_model_dir}')
         cfg = Config.from_file(
             osp.join(local_model_dir, ModelFile.CONFIGURATION))
diff --git a/modelscope/utils/hub.py b/modelscope/utils/hub.py
index 868e751b..c427b7a3 100644
--- a/modelscope/utils/hub.py
+++ b/modelscope/utils/hub.py
@@ -6,6 +6,7 @@ from typing import List, Optional, Union
 
 from requests import HTTPError
 
+from modelscope.hub.constants import Licenses, ModelVisibility
 from modelscope.hub.file_download import model_file_download
 from modelscope.hub.snapshot_download import snapshot_download
 from modelscope.utils.config import Config
@@ -16,8 +17,8 @@ def create_model_if_not_exist(
         api,
         model_id: str,
         chinese_name: str,
-        visibility: Optional[int] = 5,  # 1-private, 5-public
-        license: Optional[str] = 'apache-2.0',
+        visibility: Optional[int] = ModelVisibility.PUBLIC,
+        license: Optional[str] = Licenses.APACHE_V2,
         revision: Optional[str] = 'master'):
     exists = True
     try:
diff --git a/tests/hub/test_hub_examples.py b/tests/hub/test_hub_examples.py
index b63445af..b21cae51 100644
--- a/tests/hub/test_hub_examples.py
+++ b/tests/hub/test_hub_examples.py
@@ -1,9 +1,9 @@
 import unittest
 
-from maas_hub.maas_api import MaasApi
-
+from modelscope.hub.api import HubApi
 from modelscope.utils.hub import create_model_if_not_exist
 
+# note this is temporary before official account management is ready
 USER_NAME = 'maasadmin'
 PASSWORD = '12345678'
 
@@ -11,8 +11,7 @@ PASSWORD = '12345678'
 class HubExampleTest(unittest.TestCase):
 
     def setUp(self):
-        self.api = MaasApi()
-        # note this is temporary before official account management is ready
+        self.api = HubApi()
         self.api.login(USER_NAME, PASSWORD)
 
     @unittest.skip('to be used for local test only')
@@ -22,7 +21,6 @@ class HubExampleTest(unittest.TestCase):
         model_chinese_name = '达摩卡通化模型'
         model_org = 'damo'
         model_id = '%s/%s' % (model_org, model_name)
-
         created = create_model_if_not_exist(self.api, model_id,
                                             model_chinese_name)
         if not created:
diff --git a/tests/hub/test_hub_operation.py b/tests/hub/test_hub_operation.py
index e0adc013..035b183e 100644
--- a/tests/hub/test_hub_operation.py
+++ b/tests/hub/test_hub_operation.py
@@ -4,7 +4,8 @@ import tempfile
 import unittest
 import uuid
 
-from modelscope.hub.api import HubApi
+from modelscope.hub.api import HubApi, ModelScopeConfig
+from modelscope.hub.constants import Licenses, ModelVisibility
 from modelscope.hub.file_download import model_file_download
 from modelscope.hub.repository import Repository
 from modelscope.hub.snapshot_download import snapshot_download
@@ -31,8 +32,8 @@ class HubOperationTest(unittest.TestCase):
         self.api.create_model(
             model_id=self.model_id,
             chinese_name=model_chinese_name,
-            visibility=5,  # 1-private, 5-public
-            license='apache-2.0')
+            visibility=ModelVisibility.PUBLIC,
+            license=Licenses.APACHE_V2)
         temporary_dir = tempfile.mkdtemp()
         self.model_dir = os.path.join(temporary_dir, self.model_name)
         repo = Repository(self.model_dir, clone_from=self.model_id)