diff --git a/README.md b/README.md
index 4ce0d53..0e0314f 100644
--- a/README.md
+++ b/README.md
@@ -152,3 +152,34 @@ if __name__ == "__main__":
         print(f"ping failed, {error}")
 
 ```
+
+Write points using GRPC protocol:
+
+```python
+from datetime import datetime
+from opengemini_client import Client, Config, Address, Point, BatchPoints, Precision
+from opengemini_client.models import GrpcConfig
+
+if __name__ == "__main__":
+    config = Config(address=[Address(host='127.0.0.1', port=8086)],
+                    grpc_config=GrpcConfig(
+                        address=[Address(host='127.0.0.1', port=8305)],
+                    ))
+    cli = Client(config)
+    try:
+        database = 'test'
+        measurement = 'test_measurement'
+        point = Point(
+            measurement=measurement,
+            precision=Precision.PrecisionSecond,
+            fields={'Humidity': 87, 'Temperature': 25},
+            tags={'Weather': 'foggy'},
+            timestamp=datetime.now(),
+        )
+        batch_points = BatchPoints(points=[point])
+        cli.write_by_grpc(database=database, batch_points=batch_points)
+        print(f"write points success")
+    except Exception as error:
+        print(f"write points failed, {error}")
+
+```
diff --git a/README_CN.md b/README_CN.md
index 480b1ac..7f310e0 100644
--- a/README_CN.md
+++ b/README_CN.md
@@ -153,3 +153,33 @@ if __name__ == "__main__":
         print(f"ping failed, {error}")
 
 ```
+
+使用grpc协议写入points：
+```python
+from datetime import datetime
+from opengemini_client import Client, Config, Address, Point, BatchPoints, Precision
+from opengemini_client.models import GrpcConfig
+
+if __name__ == "__main__":
+    config = Config(address=[Address(host='127.0.0.1', port=8086)],
+                    grpc_config=GrpcConfig(
+                        address=[Address(host='127.0.0.1', port=8305)],
+                    ))
+    cli = Client(config)
+    try:
+        database = 'test'
+        measurement = 'test_measurement'
+        point = Point(
+            measurement=measurement,
+            precision=Precision.PrecisionSecond,
+            fields={'Humidity': 87, 'Temperature': 25},
+            tags={'Weather': 'foggy'},
+            timestamp=datetime.now(),
+        )
+        batch_points = BatchPoints(points=[point])
+        cli.write_by_grpc(database=database, batch_points=batch_points)
+        print(f"write points success")
+    except Exception as error:
+        print(f"write points failed, {error}")
+
+```
diff --git a/opengemini_client/client.py b/opengemini_client/client.py
index e29450f..1e4c94a 100644
--- a/opengemini_client/client.py
+++ b/opengemini_client/client.py
@@ -44,11 +44,12 @@ def query(self, query: Query) -> QueryResult:
         """
 
     @abstractmethod
-    def write_batch_points(self, database: str, batch_points: BatchPoints):
+    def write_batch_points(self, database: str, batch_points: BatchPoints, rp: str = ''):
         """
         batch points to assigned database
         :param database:  name
         :param batch_points: BatchPoints object
+        :param rp: retention policy
         :return: return an error message
         """
 
diff --git a/opengemini_client/client_impl.py b/opengemini_client/client_impl.py
index 15c8ee9..add99f2 100644
--- a/opengemini_client/client_impl.py
+++ b/opengemini_client/client_impl.py
@@ -223,9 +223,9 @@ def _query_post(self, query: Query) -> QueryResult:
             return resolve_query_body(resp)
         raise HTTPError(f"query_post error resp, code: {resp.status_code}, body: {resp.text}")
 
-    def write_batch_points(self, database: str, batch_points: BatchPoints):
+    def write_batch_points(self, database: str, batch_points: BatchPoints, rp: str = ''):
         server_url = self._get_server_url()
-        params = {'db': database}
+        params = {'db': database, 'rp': rp}
         with io.StringIO() as writer:
             for point in batch_points.points:
                 if point is None:
diff --git a/opengemini_client/models.py b/opengemini_client/models.py
index 56a5fe0..adc27d7 100644
--- a/opengemini_client/models.py
+++ b/opengemini_client/models.py
@@ -16,7 +16,7 @@
 from dataclasses import field, dataclass
 from datetime import datetime, timedelta
 from enum import Enum
-from typing import Dict, Union, Optional, List, Any
+from typing import Dict, Union, Optional, List, Any, Iterable
 
 
 @dataclass
@@ -236,7 +236,7 @@ def write_timestamp(self, writer: io.StringIO):
 
 @dataclass
 class BatchPoints:
-    points: List[Point] = field(default_factory=list)
+    points: Iterable[Point] = field(default_factory=list)
 
 
 @dataclass