diff --git a/examples/ch1-01-genesis/1-hello/main.go b/examples/ch1.1/1-hello/main.go
similarity index 55%
rename from examples/ch1-01-genesis/1-hello/main.go
rename to examples/ch1.1/1-hello/main.go
index 2bc9e2c..9880116 100644
--- a/examples/ch1-01-genesis/1-hello/main.go
+++ b/examples/ch1.1/1-hello/main.go
@@ -1,4 +1,4 @@
-// go run chai2010.cn/gobook/examples/ch1-01-genesis/1-hello
+// go run chai2010.cn/gobook/examples/ch1.1/1-hello
 
 package main
 
diff --git a/examples/ch2-01-quick-guide/hello-01/main.go b/examples/ch1.2/hello-01/main.go
similarity index 100%
rename from examples/ch2-01-quick-guide/hello-01/main.go
rename to examples/ch1.2/hello-01/main.go
diff --git a/examples/ch2-01-quick-guide/hello-02/main.go b/examples/ch1.2/hello-02/main.go
similarity index 100%
rename from examples/ch2-01-quick-guide/hello-02/main.go
rename to examples/ch1.2/hello-02/main.go
diff --git a/examples/ch2-01-quick-guide/hello-03/hello.c b/examples/ch1.2/hello-03/hello.c
similarity index 100%
rename from examples/ch2-01-quick-guide/hello-03/hello.c
rename to examples/ch1.2/hello-03/hello.c
diff --git a/examples/ch2-01-quick-guide/hello-03/main.go b/examples/ch1.2/hello-03/main.go
similarity index 100%
rename from examples/ch2-01-quick-guide/hello-03/main.go
rename to examples/ch1.2/hello-03/main.go
diff --git a/examples/ch2-01-quick-guide/hello-04/main.go b/examples/ch1.2/hello-04/main.go
similarity index 100%
rename from examples/ch2-01-quick-guide/hello-04/main.go
rename to examples/ch1.2/hello-04/main.go
diff --git a/examples/ch2-01-quick-guide/hello-05/main.go b/examples/ch1.2/hello-05/main.go
similarity index 100%
rename from examples/ch2-01-quick-guide/hello-05/main.go
rename to examples/ch1.2/hello-05/main.go
diff --git a/examples/ch2-01-quick-guide/hello-06/main.go b/examples/ch1.2/hello-06/main.go
similarity index 100%
rename from examples/ch2-01-quick-guide/hello-06/main.go
rename to examples/ch1.2/hello-06/main.go