WPS is not a member, and the size of the PDF file cannot be reduced. What other methods can reduce the size of PDF files?
PDF files can also be compressed and saved as zip files with compression software, and files can also be reduced and opened with decompression software when used. If the content of PDF file is mainly pictures, it can be processed by PS software, and the compression ratio of pictures can be changed without complicated operation. See attached figure for operation. (If you don't use PS, you have to join WPS members to spend money. )