diff --git a/docs/API.md b/docs/API.md
index 0a1f8cf..b5d578d 100644
--- a/docs/API.md
+++ b/docs/API.md
@@ -110,6 +110,7 @@ __Parameters__
 | | | ap-northeast-1|
 | | | ap-southeast-2|
 | | | sa-east-1|
+| | | cn-north-1|
 
 __Example__
 
diff --git a/minio/helpers.py b/minio/helpers.py
index 071d5d6..c0dd62f 100644
--- a/minio/helpers.py
+++ b/minio/helpers.py
@@ -207,6 +207,7 @@ AWS_S3_ENDPOINT_MAP = {
     'ap-southeast-1': 's3-ap-southeast-1.amazonaws.com',
     'ap-northeast-1': 's3-ap-northeast-1.amazonaws.com',
     'ap-northeast-2': 's3-ap-northeast-2.amazonaws.com',
+    'cn-north-1': 's3.cn-north-1.amazonaws.com.cn'
 }
 
 def get_s3_endpoint(region):

Implement AWS China region support
Our Python Client library should also support  AWS China region s3.cn-north-1.amazonaws.com.cn

It has been implemented in minio-go, implementation reference:  https://github.com/minio/minio-go/commit/190ac7b4b7e7ba8a669553674b748bdcace6c59e
diff --git a/tests/unit/get_s3_endpoint_test.py b/tests/unit/get_s3_endpoint_test.py
new file mode 100644
index 0000000..775a889
--- /dev/null
+++ b/tests/unit/get_s3_endpoint_test.py
@@ -0,0 +1,29 @@
+# -*- coding: utf-8 -*-
+# Minio Python Library for Amazon S3 Compatible Cloud Storage, (C) 2015 Minio, Inc.
+#
+# 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.
+
+from unittest import TestCase
+from nose.tools import eq_
+from minio.helpers import get_s3_endpoint, is_valid_endpoint
+
+class GetS3Endpoint(TestCase):
+    def test_get_s3_endpoint(self):
+        eq_('s3.amazonaws.com', get_s3_endpoint('us-east-1'))
+        eq_('s3.amazonaws.com', get_s3_endpoint('foo'))
+        eq_('s3-eu-west-1.amazonaws.com', get_s3_endpoint('eu-west-1'))
+        eq_('s3.cn-north-1.amazonaws.com.cn', get_s3_endpoint('cn-north-1'))
+
+    def test_is_valid_endpoint(self):
+        eq_(True, is_valid_endpoint('s3.amazonaws.com'))
+        eq_(True, is_valid_endpoint('s3.cn-north-1.amazonaws.com.cn'))

pip install -e .[dev]
parse_log_pytest
pytest
nose mock fake-factory pytest
3.5
pytest --no-header -rA --tb=line --color=no -p no:cacheprovider -W ignore::DeprecationWarning
attrs @ file:///opt/conda/conda-bld/attrs_1642510447205/work
certifi==2015.4.28
fake-factory==9999.9.9
importlib-metadata @ file:///tmp/build/80754af9/importlib-metadata_1631916693255/work
iniconfig @ file:///home/linux1/recipes/ci/iniconfig_1610983019677/work
-e git+https://github.com/minio/minio-py.git@d15c965c107f49465c710f9ff22c72120014ff2a#egg=minio
mock==5.2.0
more-itertools @ file:///tmp/build/80754af9/more-itertools_1637733554872/work
nose==1.3.7
packaging @ file:///tmp/build/80754af9/packaging_1637314298585/work
pluggy @ file:///tmp/build/80754af9/pluggy_1615976315926/work
py @ file:///opt/conda/conda-bld/py_1644396412707/work
pyparsing @ file:///tmp/build/80754af9/pyparsing_1635766073266/work
pytest==6.2.4
pytz==2025.2
toml @ file:///tmp/build/80754af9/toml_1616166611790/work
typing_extensions @ file:///opt/conda/conda-bld/typing_extensions_1647553014482/work
urllib3==1.26.20
zipp @ file:///tmp/build/80754af9/zipp_1633618647012/work

name: minio-py
channels:
  - defaults
  - https://repo.anaconda.com/pkgs/main
  - https://repo.anaconda.com/pkgs/r
  - conda-forge
dependencies:
  - _libgcc_mutex=0.1=main
  - _openmp_mutex=5.1=1_gnu
  - attrs=21.4.0=pyhd3eb1b0_0
  - ca-certificates=2025.2.25=h06a4308_0
  - importlib-metadata=4.8.1=py36h06a4308_0
  - importlib_metadata=4.8.1=hd3eb1b0_0
  - iniconfig=1.1.1=pyhd3eb1b0_0
  - ld_impl_linux-64=2.40=h12ee557_0
  - libffi=3.3=he6710b0_2
  - libgcc-ng=11.2.0=h1234567_1
  - libgomp=11.2.0=h1234567_1
  - libstdcxx-ng=11.2.0=h1234567_1
  - more-itertools=8.12.0=pyhd3eb1b0_0
  - ncurses=6.4=h6a678d5_0
  - openssl=1.1.1w=h7f8727e_0
  - packaging=21.3=pyhd3eb1b0_0
  - pip=21.2.2=py36h06a4308_0
  - pluggy=0.13.1=py36h06a4308_0
  - py=1.11.0=pyhd3eb1b0_0
  - pyparsing=3.0.4=pyhd3eb1b0_0
  - pytest=6.2.4=py36h06a4308_2
  - python=3.6.13=h12debd9_1
  - readline=8.2=h5eee18b_0
  - setuptools=58.0.4=py36h06a4308_0
  - sqlite=3.45.3=h5eee18b_0
  - tk=8.6.14=h39e8969_0
  - toml=0.10.2=pyhd3eb1b0_0
  - typing_extensions=4.1.1=pyh06a4308_0
  - wheel=0.37.1=pyhd3eb1b0_0
  - xz=5.6.4=h5eee18b_1
  - zipp=3.6.0=pyhd3eb1b0_0
  - zlib=1.2.13=h5eee18b_1
  - pip:
      - certifi==2015.04.28
      - fake-factory==9999.9.9
      - mock==5.2.0
      - nose==1.3.7
      - pytz==2025.2
      - urllib3==1.26.20
prefix: /opt/conda/envs/minio-py

tests/unit/get_s3_endpoint_test.py::GetS3Endpoint::test_get_s3_endpoint
tests/unit/get_s3_endpoint_test.py::GetS3Endpoint::test_is_valid_endpoint
minio/helpers.py docs/API.md
minio/helpers.py docs/API.md