It took two days to do it. This problem can occur in two situations: 1. Quit halfway while making several files, and then make another file, resulting in the files not being recorded in the same subtitle. Solution: delete all the supplementary documents made at one time, and don't give up halfway. 2. When submitting supplementary documents voluntarily, you need to add corresponding requests. If there is no request, there will be no application number by default.