diff --git a/src/guide/develop/client_design.md b/src/guide/develop/client_design.md
index 93d854c3..2506ea25 100644
--- a/src/guide/develop/client_design.md
+++ b/src/guide/develop/client_design.md
@@ -30,6 +30,7 @@ classDiagram
         + enum compressMethod // gzip, zstd, br
         + TlsConfig tlsConfig // nullable, language specific
         + void close()
+        + GRPCConfig grpcConfig // if null, call WriteByGRPC will nothing to do, otherwise send write request by gRPC
     }
 
     class Address {
@@ -48,6 +49,15 @@ classDiagram
         + Duration batchInterval // must be greater than 0
         + int batchSize // must be greater than 0, if set too large, may cause client overflow or server-side rejected the request.
     }
+    
+    class GRPCConfig {
+        + List~Address~ addresses
+        + AuthConfig authConfig
+        + BatchConfig batchConfig
+        + enum compressMethod // gzip, zstd, br
+        + TlsConfig tlsConfig
+        + timeout
+    }
 
     OpenGeminiClient "1" *-- "many" Address: contains
     OpenGeminiClient *-- AuthConfig: contains
@@ -148,6 +158,7 @@ classDiagram
         + WritePointWithRp(String database, String rp, Point point)
         + WriteBatchPoints(String database, BatchPoints batchPoints)
         + WriteBatchPointsWithRp(String database, String rp, BatchPoints batchPoints)
+        + WriteByGRPC(req WriteRequest) // WriteRequest build from RecordBuilder
     }
     class BatchPoints {
         + List~Point~ points
@@ -169,6 +180,20 @@ classDiagram
         + SetPrecision(type)
         + SetMeasurement(name)
     }
+    
+    class RecordBuilder {   // new from NewRecordBuilder with database and retention policy params
+        + RecordBuilder Authenticate(String username, String password)
+        + RecordBuilder AddRecord(RecordLine line) // RecordLine build from RecordLineBuilder
+        + WriteRequest Build()
+    }
+    
+    class RecordLineBuilder {   // new from NewRecordLineBuilder with measurement param
+        + RecordLineBuilder AddTag(String key, String value)
+        + RecordLineBuilder AddTags(map[String]String)
+        + RecordLineBuilder AddField(String key, Any value)
+        + RecordLineBuilder AddFields(map[String]Any)
+        + RecordLine Build(Time time)
+    }
 
     BatchPoints "1" *-- "many" Point: contains
 ```
diff --git a/src/zh/guide/develop/client_design.md b/src/zh/guide/develop/client_design.md
index ca887445..68fe17d7 100644
--- a/src/zh/guide/develop/client_design.md
+++ b/src/zh/guide/develop/client_design.md
@@ -31,6 +31,7 @@ classDiagram
         + enum compressMethod // gzip, zstd, br
         + TlsConfig tlsConfig // nullable, language specific
         + void close()
+        + GRPCConfig grpcConfig // if null, call WriteByGRPC will nothing to do, otherwise send write request by gRPC
     }
 
     class Address {
@@ -50,6 +51,15 @@ classDiagram
         + int batchSize // must be greater than 0
     }
 
+    class GRPCConfig {
+        + List~Address~ addresses
+        + AuthConfig authConfig
+        + BatchConfig batchConfig
+        + enum compressMethod // gzip, zstd, br
+        + TlsConfig tlsConfig
+        + timeout
+    }
+
     OpenGeminiClient "1" *-- "many" Address: contains
     OpenGeminiClient *-- AuthConfig: contains
     OpenGeminiClient *-- BatchConfig: contains
@@ -149,6 +159,7 @@ classDiagram
         + WritePointWithRp(String database, String rp, Point point)
         + WriteBatchPoints(String database, BatchPoints batchPoints)
         + WriteBatchPointsWithRp(String database, String rp, BatchPoints batchPoints)
+        + WriteByGRPC(req WriteRequest) // WriteRequest build from RecordBuilder
     }
     class BatchPoints {
         + List~Point~ points
@@ -171,6 +182,20 @@ classDiagram
         + SetMeasurement(name)
     }
 
+    class RecordBuilder {   // new from NewRecordBuilder with database and retention policy params
+        + RecordBuilder Authenticate(String username, String password)
+        + RecordBuilder AddRecord(RecordLine line) // RecordLine build from RecordLineBuilder
+        + WriteRequest Build()
+    }
+
+    class RecordLineBuilder {   // new from NewRecordLineBuilder with measurement param
+        + RecordLineBuilder AddTag(String key, String value)
+        + RecordLineBuilder AddTags(map[String]String)
+        + RecordLineBuilder AddField(String key, Any value)
+        + RecordLineBuilder AddFields(map[String]Any)
+        + RecordLine Build(Time time)
+    }
+
     BatchPoints "1" *-- "many" Point: contains
 ```