effect

          _showMap () {
            let map = new BMap.Map("container");  // Map
            let point = new BMap.Point(116.4185,39.9142);  // 
            map.centerAndZoom(point, 19); // 
            map.enableScrollWheelZoom(true);  //

            function makerTeam(teams) {
              for (let i=0,len=teams.length; i<len ; iPP) {
                // 
                let point = new BMap.Point(teams[i].lng, teams[i].lat);
                let team = new BMap.Icon(teams[i].name === "" ? "src/images/fireFightingTeam.png" : "src/images/otherTeam.png", new BMap.Size(17.3*2,14.2*2),{imageSize:new BMap.Size(17.3*2,14.2*2)});
                let marker = new BMap.Marker(point,{icon:team});
                map.addOverlay(marker);
                // 
                let label = new BMap.Label(teams[i].name,{offset:new BMap.Size(-10,30)});
                label.setStyle({
                  color: "-sharpfff",
                  fontSize: "12px",
                  padding: "5px",
                  background: "rgba(0, 0, 0, .5)",
                  border: "2px solid -sharp000",
                  fontFamily:"",
                  borderRadius: "3px"
                });
                marker.setLabel(label);
              }
            }
            makerTeam(this.teams);

            function vehicleRun (vehicles) {
              for (let i=0,len=vehicles.length; i<len; iPP) {
                var lushu;
                let circle;
                // 
                let drv = new BMap.DrivingRoute(vehicles[i].city, {
                  onSearchComplete: function(res) {
                    if (drv.getStatus() == BMAP_STATUS_SUCCESS) {
                      let plan = res.getPlan(0);
                      let arrPois =[];
                      for(let j=0;j<plan.getNumRoutes();jPP){
                        let route = plan.getRoute(j);
                        arrPois= arrPois.concat(route.getPath());
                      }
                      map.addOverlay(new BMap.Polyline(arrPois, {strokeColor: "-sharp111"}));
                      map.setViewport(arrPois);

                      lushu = new BMapLib.LuShu(map,arrPois,{
                        defaultContent: "",//""
                        autoView: true,//
                        icon: new BMap.Icon("src/images/selectedVehicle.png", new BMap.Size(37.58*2,13.6*2),{imageSize:new BMap.Size(37.58*2,13.6*2)}),
                        speed: 100,
                        enableRotation: true,//marker
                        landmarkPois: [
                          {lng:116.314782,lat:39.913508,html:"",pauseTime:2},
                          {lng:116.315391,lat:39.964429,html:"<div><img src="http://map.baidu.com/img/logo-map.gif"/></div>",pauseTime:3},
                          {lng:116.381476,lat:39.974073,html:"<div><img src="http://ishouji.baidu.com/resource/images/map/show_pic04.gif"/></div>",pauseTime:2}
                        ]
                      });
                      circle = new BMapLib.LuShu(map,arrPois,{
                        defaultContent: "",//""
                        autoView: true,//
                        icon: new BMap.Icon("src/images/circle.png", new BMap.Size(56.69*10,31.89*10),{imageSize:new BMap.Size(56.69*10,31.89*10)}),
                        speed: 100,
                        enableRotation: true,//marker
                        landmarkPois: [
                          {lng:116.314782,lat:39.913508,html:"",pauseTime:2},
                          {lng:116.315391,lat:39.964429,html:"<div><img src="http://map.baidu.com/img/logo-map.gif"/></div>",pauseTime:3},
                          {lng:116.381476,lat:39.974073,html:"<div><img src="http://ishouji.baidu.com/resource/images/map/show_pic04.gif"/></div>",pauseTime:2}
                        ]
                      });
                      console.log(lushu)
                    }
                  }
                });
                drv.search(vehicles[i].start, vehicles[i].end);
                setTimeout(function(){
                  lushu.start();
                  circle.start();
                },1000);
              }
            }
            vehicleRun(this.vehicles);
          }

Why is the cover truck on the right not displayed, but the red dotted circle is also shown in the picture?