diff --git a/obshell/__init__.py b/obshell/__init__.py
index 19662f4..8ab8201 100644
--- a/obshell/__init__.py
+++ b/obshell/__init__.py
@@ -14,7 +14,7 @@
 # limitations under the License.
 
 from .service.client_set import ClientSet
-from .service.client_v1 import TaskExecuteFailedError, OBShellHandleError
+from .service.client_v1 import TaskExecuteFailedError, OBShellHandleError, IllegalOperatorError
 from .service.client_v1 import IllegalOperatorError, ClientV1
 
 __all__ = ('ClientSet', 'TaskExecuteFailedError',
diff --git a/obshell/model/__init__.py b/obshell/model/__init__.py
index e5b00a4..b0c90fd 100644
--- a/obshell/model/__init__.py
+++ b/obshell/model/__init__.py
@@ -12,3 +12,5 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+
+from .tenant import ZoneParam,ModifyReplicaParam
diff --git a/obshell/model/format.py b/obshell/model/format.py
new file mode 100644
index 0000000..ff15b7c
--- /dev/null
+++ b/obshell/model/format.py
@@ -0,0 +1,26 @@
+# coding: utf-8
+# Copyright (c) 2024 OceanBase.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+def model_str(cls):
+    def __convert_value(value):
+        if isinstance(value, list):
+            return [__convert_value(item) for item in value]
+        elif isinstance(value, dict):
+            return {f"{key}": __convert_value(value) for key, value in value.items()}
+        else:
+            return str(value)
+    members = ", ".join(
+        f"\"{k}\":\"{__convert_value(v)}\"" for k, v in cls.__dict__.items())
+    return '{' + members.replace("'", "\"") + '}'
diff --git a/obshell/model/info.py b/obshell/model/info.py
index 038eecc..d6f3683 100644
--- a/obshell/model/info.py
+++ b/obshell/model/info.py
@@ -16,23 +16,11 @@
 from typing import List
 from enum import Enum
 
+from .format import model_str
 from obshell.model.version import Version
 from obshell.auth.base import AuthVersion
 
 
-def model_str(cls):
-    def __convert_value(value):
-        if isinstance(value, list):
-            return [__convert_value(item) for item in value]
-        elif isinstance(value, dict):
-            return {f"{key}": __convert_value(value) for key, value in value.items()}
-        else:
-            return str(value)
-    members = ", ".join(
-        f"\"{k}\":\"{__convert_value(v)}\"" for k, v in cls.__dict__.items())
-    return '{' + members.replace("'", "\"") + '}'
-
-
 class AgentInfo:
 
     def __init__(self,
diff --git a/obshell/model/ob.py b/obshell/model/ob.py
index 2d01a58..bc7ff66 100644
--- a/obshell/model/ob.py
+++ b/obshell/model/ob.py
@@ -13,7 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from .info import model_str
+from .format import model_str
 
 
 class UpgradePkgInfo:
diff --git a/obshell/model/recyclebin.py b/obshell/model/recyclebin.py
index 249a052..f351044 100644
--- a/obshell/model/recyclebin.py
+++ b/obshell/model/recyclebin.py
@@ -13,7 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from .info import model_str
+from .format import model_str
 
 
 class RecyclebinTenantInfo:
diff --git a/obshell/model/resource_pool.py b/obshell/model/resource_pool.py
index a22f7d8..bd59e7c 100644
--- a/obshell/model/resource_pool.py
+++ b/obshell/model/resource_pool.py
@@ -13,7 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from .info import model_str
+from .format import model_str
 from .unit import UnitConfig
 
 
diff --git a/obshell/model/task.py b/obshell/model/task.py
index eb491b6..3a04b69 100644
--- a/obshell/model/task.py
+++ b/obshell/model/task.py
@@ -15,7 +15,7 @@
 
 import json
 from enum import Enum
-from .info import model_str
+from .format import model_str
 
 
 class State(Enum):
diff --git a/obshell/model/tenant.py b/obshell/model/tenant.py
index 298356c..52abe37 100644
--- a/obshell/model/tenant.py
+++ b/obshell/model/tenant.py
@@ -13,7 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from .info import model_str
+from .format import model_str
 from .resource_pool import ResourcePoolWithUnit
 
 
diff --git a/obshell/model/unit.py b/obshell/model/unit.py
index 96c583f..308cbc9 100644
--- a/obshell/model/unit.py
+++ b/obshell/model/unit.py
@@ -13,7 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from .info import model_str
+from .format import model_str
 
 
 class UnitConfig:
diff --git a/setup.py b/setup.py
index d7dc2fb..5fc85be 100644
--- a/setup.py
+++ b/setup.py
@@ -17,7 +17,7 @@
 
 setup(
     name='obshell',
-    version='0.0.1',
+    version='0.0.2',
     packages=find_packages(),
     description='OBShell SDK is a powerful and easy-to-use Python library that provides developers with simple method calls to interact with the OBShell. OBShell SDK allows for quick integration, enabling developers to efficiently implement features and focus on creating value in their applications.',
     long_description=open('README.md').read(),