golang . xml output with cdata

package main

   //warning: go version must >=1.6
  import (
        "encoding/xml"
        "fmt"
        //"runtime"
)

type Test struct {
        Name CdataString `xml:"Person>Name"`
        Vast string      `xml:"vast,attr"`
        Ad   string      `xml:""`
}

type CdataString struct {
        Value string `xml:",cdata"`
}

func main() {
        //fmt.Println(runtime.Version())
        //name := CdataString{Value: "bbbccc" }
        v := &Test{
                Name: CdataString{Value: "bbbccc"},
        }
        output, err := xml.MarshalIndent(v, "  ", "    ")
        if err != nil {
                fmt.Printf("error: %v\n", err)
        }
        fmt.Println(string(output))
}

  <Test vast="">
      <Person>
          <Name><![CDATA[bbbccc]]></Name>
      </Person>
      <Ad></Ad>
  </Test>