The background program uses C# to set up the front-end divs. It refers to the virtual image javascript program of some websites. Due to time constraints, only 4 layers are used, while QQ Show uses 25 layers. Interested friends can expand. You can use the background management library to add a qqshow field to the table. The default value can be df>df>df>0 which is then taken from the database and bound to the initial image.