go []rune(chinese) 和utf8.RuneCountInString(chinese) 查询含中文的字符串长度

func main(){	
    var chinese = "我是中国人， I am Chinese"
    fmt.Println("chinese length", len(chinese))
    fmt.Println("chinese word length", len([]rune(chinese)))
    fmt.Println("chinese word length", utf8.RuneCountInString(chinese))
}

输出:

chinese length 31
chinese word length 19
chinese word length 19