With this patched Client of Xinzhizao Tool you can SAVE PDF files and PCB to your pc and open them offline 
Version: 4.65 (Updated Mar/23)
Server: Global/China
Language: English/Chinese
File size: 30.0MB
Include PDF Passwords List, and 6 (Six) Months of Future Updates.
Content Type: Free for Members only
File Password: Yes
*** Now Patch can Save PCB FILES (Still needs Embedded Viewer from XZZ, however this function can be useful for reverse PCB FILES)
*** Still needs a VIP ACCOUNT FROM XZZ TO DOWNLOAD ***