diff --git a/apm-network/src/main/proto/ApplicationRegisterService.proto b/apm-network/src/main/proto/ApplicationRegisterService.proto
index 702cde9fd..9c3285d54 100644
--- a/apm-network/src/main/proto/ApplicationRegisterService.proto
+++ b/apm-network/src/main/proto/ApplicationRegisterService.proto
@@ -3,7 +3,7 @@ syntax = "proto3";
 option java_multiple_files = true;
 option java_package = "org.skywalking.apm.network.trace.proto";
 
-import "KeyValue.proto";
+import "KeyWithIntegerValue.proto";
 
 //register service for ApplicationCode, this service is called when service starts.
 service ApplicationRegisterService {
@@ -16,5 +16,5 @@ message Application {
 }
 
 message ApplicationMapping {
-    repeated KeyValue application = 1;
+    repeated KeyWithIntegerValue application = 1;
 }
\ No newline at end of file
diff --git a/apm-network/src/main/proto/KeyWithIntegerValue.proto b/apm-network/src/main/proto/KeyWithIntegerValue.proto
new file mode 100644
index 000000000..3a0e4e602
--- /dev/null
+++ b/apm-network/src/main/proto/KeyWithIntegerValue.proto
@@ -0,0 +1,9 @@
+syntax = "proto3";
+
+option java_multiple_files = true;
+option java_package = "org.skywalking.apm.network.collecor.proto";
+
+message KeyWithIntegerValue {
+    string key = 1;
+    int32 value = 2;
+}
diff --git a/apm-network/src/main/proto/KeyWithStringValue.proto b/apm-network/src/main/proto/KeyWithStringValue.proto
new file mode 100644
index 000000000..dabb4d395
--- /dev/null
+++ b/apm-network/src/main/proto/KeyWithStringValue.proto
@@ -0,0 +1,9 @@
+syntax = "proto3";
+
+option java_multiple_files = true;
+option java_package = "org.skywalking.apm.network.collecor.proto";
+
+message KeyWithStringValue {
+    string key = 1;
+    string value = 2;
+}
diff --git a/apm-network/src/main/proto/RegisterService.proto b/apm-network/src/main/proto/RegisterService.proto
deleted file mode 100644
index 16978439b..000000000
--- a/apm-network/src/main/proto/RegisterService.proto
+++ /dev/null
@@ -1,20 +0,0 @@
-syntax = "proto3";
-
-option java_multiple_files = true;
-option java_package = "org.skywalking.apm.network.trace.proto";
-
-//register service for ApplicationCode, this service is called when service starts.
-service ApplicationRegisterService {
-    rpc register (Application) returns (ApplicationMapping) {
-    }
-}
-
-message Application {
-    string applicationCode = 1;
-}
-
-message ApplicationMapping {
-    int32 applicationId = 1;
-    Application application = 2;
-}
-
diff --git a/apm-network/src/main/proto/TraceSegmentService.proto b/apm-network/src/main/proto/TraceSegmentService.proto
index 471cac5a5..6cfa64929 100644
--- a/apm-network/src/main/proto/TraceSegmentService.proto
+++ b/apm-network/src/main/proto/TraceSegmentService.proto
@@ -4,7 +4,7 @@ option java_multiple_files = true;
 option java_package = "org.skywalking.apm.network.trace.proto";
 
 import "Downstream.proto";
-import "KeyValue.proto";
+import "KeyWithStringValue.proto";
 
 service TraceSegmentService {
     rpc collect (stream UpstreamSegment) returns (Downstream) {
@@ -49,7 +49,7 @@ message SpanObject {
     int32 componentId = 11;
     string component = 12;
     bool isError = 13;
-    repeated KeyValue tags = 14;
+    repeated KeyWithStringValue tags = 14;
     repeated LogMessage logs = 15;
 }
 
@@ -68,5 +68,5 @@ enum SpanLayer {
 
 message LogMessage {
     int64 time = 1;
-    repeated KeyValue data = 2;
+    repeated KeyWithStringValue data = 2;
 }