(It seems that I have obtained this source code before. There should be a problem with the test and it has not been released. This time, at least this one has been built successfully. After the main site is successfully built, you need to select a price increase template to publish a product, and you need to select a product to set a price increase template. This is an endless loop. It may be my problem. The source code is a bit stuck, so I won't test it in depth. Do your own research if you must!)