1，wms服务

2，加载代码

        let provider = new Cesium.WebMapServiceImageryProvider({url: "http://support.supermap.com.cn:8090/iserver/services/map-china400/wms111/China_4326",enablePickFeatures:true,rectangle: Cesium.Rectangle.fromDegrees(-180.0, -85.0511287798065, 180.0, 85.05112877980648),layers: 'China_4326',parameters: {TRANSPARENT: true,format: 'image/png',service:'WMS'}});let imageryLayer = viewer.imageryLayers.addImageryProvider(provider);viewer.flyTo(imageryLayer);

3，加载效果