tuchongyang opened a new issue #16496:
URL: https://github.com/apache/echarts/issues/16496


   ### Version
   
   5.3.0
   
   ### Link to Minimal Reproduction
   
   _No response_
   
   ### Steps to Reproduce
   
   series: [{ // 地图块的相关信息
                       name: '地域数量',
                       type: 'map',
                       // left: '20%',
                       top: '10%',
                       aspectScale: 1.1,
                       roam: false,
                       zoom: 1.1,
                       map: 'china',
                       label: {
                           show: false,
                           formatter:(params)=>{
                               const a = 
this.mapData.find(a=>a.name==params.name)
                               return a && params.name || ''
                           }
                       },
                       scaleLimit:{
                           min: .5,
                           max: 5
                       },
                       itemStyle:{
                           areaColor: '#045fb9',
                           borderWidth: 2,
                           borderColor: 'rgba(164,226,249,.3)',
                           opacity: .5
                       },
                       select:{
                           disabled: true
                       },
                       // geoIndex: 0, // 不可缺少,否则无tooltip 指示效果
                       data: datas,
                       markPoint:{
                           data: markTemp,
                           label:{
                               show: true,
                               formatter:(params)=>{
                                   // const a = 
this.mapData.find(a=>a.name==params.name)
                                   return params.name || ''
                               },
                               offset:[0,30]
                           },
                           itemStyle:{
                               opacity: .9
                           }
                       },
                       markLine:{
                           data: lineTemp,
                           symbol: 'none',
                           smooth: true,
                           lineStyle: {
                               curveness: .5,
                               smooth: true,
                           },
                           animationDelay:()=>{
                               return Math.random()*200
                           }
                       },
                   }]
   
   ### Current Behavior
   
   添加markLine后,可以正常绘制线条,但是无论怎么设置都不能画出曲线,求教画曲线的方法。
   
   ### Expected Behavior
   
   希望markLine画出曲线
   
   ### Environment
   
   ```markdown
   - OS:Windows 10
   - Browser:Chrome 98.0
   - Framework:Vue
   ```
   
   
   ### Any additional comments?
   
   _No response_


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