diff --git a/LICENSE b/LICENSE
index d81188a..68428fd 100755
--- a/LICENSE
+++ b/LICENSE
@@ -26,3 +26,41 @@ SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+=============================================================================
+
+ADDITIONAL ATTRIBUTION NOTICE:
+
+Parts of this software are based on the Django project, which is licensed
+under the three-clause BSD license. The original Django project is
+copyright (c) Django Software Foundation and individual contributors.
+
+Original Django License:
+
+Copyright (c) Django Software Foundation and individual contributors.
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+
+    1. Redistributions of source code must retain the above copyright notice,
+       this list of conditions and the following disclaimer.
+
+    2. Redistributions in binary form must reproduce the above copyright
+       notice, this list of conditions and the following disclaimer in the
+       documentation and/or other materials provided with the distribution.
+
+    3. Neither the name of Django nor the names of its contributors may be used
+       to endorse or promote products derived from this software without
+       specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
\ No newline at end of file
diff --git a/README.md b/README.md
index ca14f5f..7ad451c 100755
--- a/README.md
+++ b/README.md
@@ -1,6 +1,15 @@
 # GaussDB dialect for Django
+![PyPI](https://img.shields.io/pypi/v/gaussdb-django)
+![PyPI - Python Version](https://img.shields.io/pypi/pyversions/gaussdb-django)
 
-This adds compatibility for [GaussDB](https://github.com/HuaweiCloudDeveloper/gaussdb-django) to Django.
+
+This adds compatibility for [GaussDB](https://www.huaweicloud.com/product/gaussdb.html) to Django.
+
+## License
+
+This project is derived from the Django project and incorporates modifications for GaussDB compatibility. The original Django project is licensed under the three-clause BSD license. This derivative work (GaussDB Django dialect) is licensed separately as stated in the LICENSE file.
+
+Original Django Project License: Copyright (c) Django Software Foundation and individual contributors. All rights reserved.
 
 ## Installation Guide
 
diff --git a/gaussdb_django/__init__.py b/gaussdb_django/__init__.py
index 20bb87a..bb4cb13 100755
--- a/gaussdb_django/__init__.py
+++ b/gaussdb_django/__init__.py
@@ -1,3 +1,18 @@
+"""
+GaussDB Django dialect - initialization module.
+This module incorporates code from the Django project, which is
+licensed under the three-clause BSD license.
+Copyright (c) Django Software Foundation and individual contributors.
+All rights reserved.
+
+This derivative work is licensed under the same BSD license.
+Copyright (c) 2025, HuaweiCloudDeveloper
+All rights reserved.
+
+For more information about Django's license, see the LICENSE file in the
+root directory of this distribution.
+"""
+
 from .base import DatabaseWrapper
 
 __all__ = ["DatabaseWrapper"]
diff --git a/gaussdb_django/base.py b/gaussdb_django/base.py
index 78885cb..d326d96 100755
--- a/gaussdb_django/base.py
+++ b/gaussdb_django/base.py
@@ -1,8 +1,20 @@
 """
-Gaussdb database backend for Django.
+GaussDB database backend for Django.
+Based on Django's PostgreSQL backend with modifications for GaussDB compatibility.
 
-Requires gaussdb >= 1.0.3
+This module incorporates code from the Django project, which is
+licensed under the three-clause BSD license.
+Copyright (c) Django Software Foundation and individual contributors.
+All rights reserved.
+
+This derivative work is licensed under the same BSD license.
+Copyright (c) 2025, HuaweiCloudDeveloper
+All rights reserved.
+
+For more information about Django's license, see the LICENSE file in the
+root directory of this distribution.
 """
+
 import asyncio
 import threading
 import warnings
diff --git a/gaussdb_django/client.py b/gaussdb_django/client.py
index 76fc311..66ed806 100755
--- a/gaussdb_django/client.py
+++ b/gaussdb_django/client.py
@@ -1,3 +1,18 @@
+"""
+GaussDB client module for Django.
+This module incorporates code from the Django project, which is
+licensed under the three-clause BSD license.
+Copyright (c) Django Software Foundation and individual contributors.
+All rights reserved.
+
+This derivative work is licensed under the same BSD license.
+Copyright (c) 2025, HuaweiCloudDeveloper
+All rights reserved.
+
+For more information about Django's license, see the LICENSE file in the
+root directory of this distribution.
+"""
+
 import signal
 
 from django.db.backends.base.client import BaseDatabaseClient
diff --git a/gaussdb_django/compiler.py b/gaussdb_django/compiler.py
index 9c4fa72..c8a44b5 100755
--- a/gaussdb_django/compiler.py
+++ b/gaussdb_django/compiler.py
@@ -1,3 +1,18 @@
+"""
+GaussDB compiler module for Django.
+This module incorporates code from the Django project, which is
+licensed under the three-clause BSD license.
+Copyright (c) Django Software Foundation and individual contributors.
+All rights reserved.
+
+This derivative work is licensed under the same BSD license.
+Copyright (c) 2025, HuaweiCloudDeveloper
+All rights reserved.
+
+For more information about Django's license, see the LICENSE file in the
+root directory of this distribution.
+"""
+
 from django.db.models.sql.compiler import (
     SQLAggregateCompiler,
     SQLCompiler,
diff --git a/gaussdb_django/creation.py b/gaussdb_django/creation.py
index 412e7ed..6a70fe9 100755
--- a/gaussdb_django/creation.py
+++ b/gaussdb_django/creation.py
@@ -1,3 +1,18 @@
+"""
+GaussDB creation module for Django.
+This module incorporates code from the Django project, which is
+licensed under the three-clause BSD license.
+Copyright (c) Django Software Foundation and individual contributors.
+All rights reserved.
+
+This derivative work is licensed under the same BSD license.
+Copyright (c) 2025, HuaweiCloudDeveloper
+All rights reserved.
+
+For more information about Django's license, see the LICENSE file in the
+root directory of this distribution.
+"""
+
 import sys
 
 from django.core.exceptions import ImproperlyConfigured
diff --git a/gaussdb_django/features.py b/gaussdb_django/features.py
index 7741083..a702066 100755
--- a/gaussdb_django/features.py
+++ b/gaussdb_django/features.py
@@ -1,3 +1,18 @@
+"""
+GaussDB features module for Django.
+This module incorporates code from the Django project, which is
+licensed under the three-clause BSD license.
+Copyright (c) Django Software Foundation and individual contributors.
+All rights reserved.
+
+This derivative work is licensed under the same BSD license.
+Copyright (c) 2025, HuaweiCloudDeveloper
+All rights reserved.
+
+For more information about Django's license, see the LICENSE file in the
+root directory of this distribution.
+"""
+
 from django.db import DataError, InterfaceError
 from django.db.backends.base.features import BaseDatabaseFeatures
 from django.utils.functional import cached_property
diff --git a/gaussdb_django/gaussdb_any.py b/gaussdb_django/gaussdb_any.py
index ecdeb17..b54b63c 100755
--- a/gaussdb_django/gaussdb_any.py
+++ b/gaussdb_django/gaussdb_any.py
@@ -1,3 +1,18 @@
+"""
+GaussDB compatibility helpers module for Django.
+This module incorporates code from the Django project, which is
+licensed under the three-clause BSD license.
+Copyright (c) Django Software Foundation and individual contributors.
+All rights reserved.
+
+This derivative work is licensed under the same BSD license.
+Copyright (c) 2025, HuaweiCloudDeveloper
+All rights reserved.
+
+For more information about Django's license, see the LICENSE file in the
+root directory of this distribution.
+"""
+
 import ipaddress
 from functools import lru_cache
 
diff --git a/gaussdb_django/introspection.py b/gaussdb_django/introspection.py
index a0c02a0..07cbfba 100755
--- a/gaussdb_django/introspection.py
+++ b/gaussdb_django/introspection.py
@@ -1,3 +1,18 @@
+"""
+GaussDB introspection module for Django.
+This module incorporates code from the Django project, which is
+licensed under the three-clause BSD license.
+Copyright (c) Django Software Foundation and individual contributors.
+All rights reserved.
+
+This derivative work is licensed under the same BSD license.
+Copyright (c) 2025, HuaweiCloudDeveloper
+All rights reserved.
+
+For more information about Django's license, see the LICENSE file in the
+root directory of this distribution.
+"""
+
 import re
 from collections import namedtuple
 
diff --git a/gaussdb_django/operations.py b/gaussdb_django/operations.py
index f92af80..c346467 100755
--- a/gaussdb_django/operations.py
+++ b/gaussdb_django/operations.py
@@ -1,3 +1,18 @@
+"""
+GaussDB operations module for Django.
+This module incorporates code from the Django project, which is
+licensed under the three-clause BSD license.
+Copyright (c) Django Software Foundation and individual contributors.
+All rights reserved.
+
+This derivative work is licensed under the same BSD license.
+Copyright (c) 2025, HuaweiCloudDeveloper
+All rights reserved.
+
+For more information about Django's license, see the LICENSE file in the
+root directory of this distribution.
+"""
+
 import json
 from functools import lru_cache, partial
 from django.conf import settings
diff --git a/gaussdb_django/schema.py b/gaussdb_django/schema.py
index 197e1e5..2791af3 100755
--- a/gaussdb_django/schema.py
+++ b/gaussdb_django/schema.py
@@ -1,3 +1,18 @@
+"""
+GaussDB schema module for Django.
+This module incorporates code from the Django project, which is
+licensed under the three-clause BSD license.
+Copyright (c) Django Software Foundation and individual contributors.
+All rights reserved.
+
+This derivative work is licensed under the same BSD license.
+Copyright (c) 2025, HuaweiCloudDeveloper
+All rights reserved.
+
+For more information about Django's license, see the LICENSE file in the
+root directory of this distribution.
+"""
+
 from django.db.backends.base.schema import BaseDatabaseSchemaEditor
 from django.db.backends.ddl_references import IndexColumns
 from .gaussdb_any import sql
diff --git a/pyproject.toml b/pyproject.toml
index fd8da4a..a89ac3f 100755
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,15 +4,16 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "gaussdb-django"
-version = "4.2.0"
+version = "4.2.1"
 description = "Django backend for GaussDB"
 readme = "README.md"
 requires-python = ">=3.10"
+license = "BSD-3-Clause"
+license-files = ["LICENSE"]
 classifiers = [
   "Development Status :: 5 - Production/Stable",
   "Framework :: Django",
   "Framework :: Django :: 4.2",
-  "License :: OSI Approved :: BSD License",
   "Operating System :: OS Independent",
   "Programming Language :: Python",
   "Programming Language :: Python :: 3",