We have received a lot of right documents which scanned in a wrong way.
In order to save your time in getting the proper scanned copy of required documents for China police clearance, we have the following suggestions for you:
1. Use scanner or All-in-one printer.
2. Choose your scanner for correct screenshot.
3. Do not use smartphone camera and APP such as CamScanner.
4. Do not insert photo into PDF by Adobe PDF Editor.
5. Do not rescale a scan by Adobe PDF Editor.
6. 1:1 Real size & 300dpi scan.
! check the required documents here http://www.chinapoliceclearance.com/how-to/216-required-documents.html#PCCdocs