diff --git a/ch2-cgo/ch2-03-cgo-types.md b/ch2-cgo/ch2-03-cgo-types.md
index de3f140..3380fb3 100644
--- a/ch2-cgo/ch2-03-cgo-types.md
+++ b/ch2-cgo/ch2-03-cgo-types.md
@@ -328,30 +328,27 @@ char *s = "Hello";
 */
 import "C"
 import (
-    "reflect"
-    "unsafe"
-    "fmt"
+	"reflect"
+	"unsafe"
 )
-
 func main() {
-    // chuyển đổi bằng reflect.SliceHeader
-    var arr0 []byte
-    var arr0Hdr = (*reflect.SliceHeader)(unsafe.Pointer(&arr0))
-    arr0Hdr.Data = uintptr(unsafe.Pointer(&C.arr[0]))
-    arr0Hdr.Len = 10
-    arr0Hdr.Cap = 10
+	// 通过 reflect.SliceHeader 转换
+	var arr0 []byte
+	var arr0Hdr = (*reflect.SliceHeader)(unsafe.Pointer(&arr0))
+	arr0Hdr.Data = uintptr(unsafe.Pointer(&C.arr[0]))
+	arr0Hdr.Len = 10
+	arr0Hdr.Cap = 10
 
-    // chuyển đổi slice
-    arr1 := (*[31]byte)(unsafe.Pointer(&C.arr[0]))[:10:10]
+	// 通过切片语法转换
+	arr1 := (*[31]byte)(unsafe.Pointer(&C.arr[0]))[:10:10]
 
+	var s0 string
+	var s0Hdr = (*reflect.StringHeader)(unsafe.Pointer(&s0))
+	s0Hdr.Data = uintptr(unsafe.Pointer(C.s))
+	s0Hdr.Len = int(C.strlen(C.s))
 
-    var s0 string
-    var s0Hdr = (*reflect.StringHeader)(unsafe.Pointer(&s0))
-    s0Hdr.Data = uintptr(unsafe.Pointer(C.s))
-    s0Hdr.Len = int(C.strlen(C.s))
-
-    sLen := int(C.strlen(C.s))
-    s1 := string((*[31]byte)(unsafe.Pointer(C.s))[:sLen:sLen])
+	sLen := int(C.strlen(C.s))
+    	s1 := string((*[31]byte)(unsafe.Pointer(C.s))[:sLen:sLen])
 }
 ```