How to transfer the data object data of the parent component to the child component, and how to use the child component after receiving it with props?

I have no problem passing a single data to the subcomponent, but the object is wrong
subcomponent:

<template>
  <div class="nowinfo" >
    <div class="nowinfo-header"></div>
    <div class="nowinfo-content">
       <div class="nowinfo-item now-date"><span>  :</span></div>
       <div class="nowinfo-item duty"><span>:</span> </div>
       <div class="nowinfo-item duty-tel"><span></span> </div>
    </div>
    <div class="remind">:2</div>
  </div>
</template>

<script>

  export default {
    name: "newinfo",
    props:{
      dutyinfo:{
        type:Object,
        required:true
      }
    },
    
    mounted: function () {
    //  console.log(dutyinfo);
    },
    data(){
        return{
          duty:this.dutyinfo
        };
    },
    methods: {
     
    },
    computed: {
        
    }
  }
</script>

parent component:

<style lang="less">
    @import "./home.less";
    @import "../../styles/common.less";
</style>
<template>
    <div class="home-main" >
        <Row :gutter="10">
            <Col span="6">
                <div class="now-info ">
                    <now-info v-bind="dutyinfo"></now-info>
                </div>       
            </Col>
            <Col span="12"></Col>
            <Col span="6"></Col>
        </Row>
    </div>
    </template>
<script>
import cityData from "./map-data/get-city-value.js";
import nowInfo from "./components/nowInfo.vue";
import attendanceCount from "./components/attendance-count.vue";
import kalendarInfo from "./components/kalendar-info.vue";
import subSchedule from "./components/subSchedule.vue";
import subWorkLog from "./components/sub-workLog.vue";
import subFileManage from "./components/sub-fileManage.vue";
import subInfoRanking from "./components/sub-infoRanking.vue";

export default {
    name: "home",
    components: {
        "now-info":nowInfo,
        "attendance-count":attendanceCount,
        "kalendar-info":kalendarInfo,
        "sub-schedule":subSchedule,
        "sub-workLog":subWorkLog,
        "sub-file-manage":subFileManage,
        "sub-info-ranking":subInfoRanking
    },
    data () {
        return {
            dutyinfo:{
                date:"",
                dutyname:"XX",
                dutyposition:"",
                telNum:18246416213,
                unreadMailCount:2  
            }
           } 
    },
    computed: {
        date () {
          var date=new Date(); 
          var l = ["","","","","","",""];  
          var year=date.getFullYear(); //   
          var mon=date.getMonth()+1; //   
          var da=date.getDate(); //   
          var day=date.getDay(); //   
          var str = "" + l[day];
          var nowDate = year + ""+mon+""+da+""+" "+" "+str;
          return nowDate;
        }
    },
    methods: {

    }
};
</script>

working overtime on weekends. I have to catch up on the project. I hope all of you can give us some advice

.
Mar.24,2021

// dutyinfo object     props 
<now-info :dutyinfo="dutyinfo"></now-info>
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b33167-403f3.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b33167-403f3.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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