diff --git a/protocol/src/main/java/com/zfoo/protocol/serializer/protobuf/PbGenerateOperation.java b/protocol/src/main/java/com/zfoo/protocol/serializer/protobuf/PbGenerateOperation.java
index 4a3f82f2..02178b4b 100644
--- a/protocol/src/main/java/com/zfoo/protocol/serializer/protobuf/PbGenerateOperation.java
+++ b/protocol/src/main/java/com/zfoo/protocol/serializer/protobuf/PbGenerateOperation.java
@@ -18,6 +18,9 @@ public class PbGenerateOperation {
     private String protoPath;
     private String outputPath;
     private String javaPackage;
+    /**
+     * 生成的类是否是record
+     */
     private boolean recordClass = false;
 
     public String getProtoPath() {
diff --git a/protocol/src/test/protobuf/all_type.proto b/protocol/src/test/protobuf/all_type.proto
index 079bb505..fc51ab45 100644
--- a/protocol/src/test/protobuf/all_type.proto
+++ b/protocol/src/test/protobuf/all_type.proto
@@ -8,6 +8,7 @@ option java_package = "start";
 
 // start_protocol_id = 100
 
+// 如果protobuf的字段的tag超过1000，则视这个字段为需要兼容的协议字段
 message AllType {
   bool     field1 = 1;
   bytes    field2 = 2;
@@ -24,6 +25,7 @@ message AllType {
   sint32   field14 = 14;
   sint64   field15 = 15;
   string   field16 = 16;
+  // 这是注释
   uint32   field17 = 17;
-  uint64   field18 = 18;
+  uint64   field18 = 1001;
 }
\ No newline at end of file