diff --git a/quickstart/chatwitheino/cmd/ch02/main.go b/quickstart/chatwitheino/cmd/ch02/main.go
index f01e0fd..4401fa8 100644
--- a/quickstart/chatwitheino/cmd/ch02/main.go
+++ b/quickstart/chatwitheino/cmd/ch02/main.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2026 CloudWeGo Authors
+ *
+ * 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.
+ */
+
 package main
 
 import (