when I make changes to a form, the option from the background is automatically filled in by v-modle.
something strange has happened! For the same code, one can be selected automatically, but not the other
<el-radio-group v-model="gender" @change="handleGender">
<el-radio-button v-for="x,key in att.gender" :key=key :label=x.value >{{x.label}}</el-radio-button>
</el-radio-group>
<el-radio-group v-model="chinese" @change="handleSpeakChinese">
<el-radio-button v-for ="x,key in att.chinese" :key=key :label=x.label></el-radio-button>
</el-radio-group> 
look at the pictures, all v-model have value! Why is one selected and the other not!