the codes are:

entities.add({ polygon: { hierarchy: new Cesium.PolygonHierarchy( Cesium.Cartesian3.fromDegreesArray([ -113.0, 30.0, -110.0, 30.0, -110.0, 33.0, -111.5, 31.0, -113.0, 33.0, ]) ), extrudedHeight: 20000.0, material: Cesium.Color.YELLOW, }, });

entities.add({ position: Cesium.Cartesian3.fromDegrees( -113.0, 30.0, 10000.0), cylinder: { length: 20000, topRadius: 20000.0, bottomRadius: 20000.0, material: Cesium.Color.RED, }, });
the render image