(As we all know, Bing search's official website updates a high-quality background map every day. Many students want to call on the interface, but the Bing server is not particularly stable in China (> 500ms). Bing upyun can upload daily Bing pictures to the cloud, and provide an interface to support picture processing and backtracking (directly link to the cloud. It takes about 300ms to complete the actual measurement from request to picture reception, depending on the network), and can choose to deploy an elegant front-end page. At present, there are many excellent Bing daily picture interfaces, which can store pictures locally on the server and provide calling interfaces, but most of them need to run in the background. In addition, at present, there is almost no similar photographing and storage interface in the cloud. So this project.)