Update README.md

README.md

@@ -176,7 +176,7 @@ DC.ready(() => {
 
 ## Demo
 
-|  ![picture](http://dc.dvgis.cn/examples/images/baselayer/baidu.png?v=1) | ![picture](http://dc.dvgis.cn/examples/images/baselayer/tdt.png?v=1) | ![picture](http://dc.dvgis.cn/examples/images/baselayer/arcgis.png?v=2) | ![picture](http://dc.dvgis.cn/examples/images/mini-scene/china.gif) |
+|  ![picture](http://dc.dvgis.cn/examples/images/baselayer/baidu.png?v=2) | ![picture](http://dc.dvgis.cn/examples/images/baselayer/tdt.png?v=1) | ![picture](http://dc.dvgis.cn/examples/images/baselayer/arcgis.png?v=2) | ![picture](http://dc.dvgis.cn/examples/images/mini-scene/china.gif) |
 |  :-----------------------------------------------------------: | :-----------------------------------------------------------: | :------------------------------------------------------------------: | :--------------------------------------------------------------: |
 |  ![picture](http://dc.dvgis.cn/examples/images/mini-scene/dfmz.gif) | ![picture](http://dc.dvgis.cn/examples/images/mini-scene/factory.gif?v=1) | ![picture](http://dc.dvgis.cn/examples/images/layer/cluster_circle.gif) | ![picture](http://dc.dvgis.cn/examples/images/model/shp_custom_shader.gif) |
 |  ![picture](http://dc.dvgis.cn/examples/images/overlay/polyline_image_trail.gif) | ![picture](http://dc.dvgis.cn/examples/images/overlay/wall_trail.gif?v=1) | ![picture](http://dc.dvgis.cn/examples/images/overlay/water.gif?v=2)  |  ![picture](http://dc.dvgis.cn/examples/images/overlay/plot-overlay.png)   |