Patched Client of Xinzhizao Tool you can SAVE PDF files and PCB to your pc and open them offline 
Version: 4.71 (Updated Jul/24)
Server: Global/China
Language: English/Chinese
File size: 34.7MB
Include PDF Passwords List
Password: Yes (Resquest it via Support)
* 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 Xinzhizao.com TO DOWNLOAD PDF And Boardview Files (WE DONT PROVIDE IT)**
*** Future Update for this patch are available for Silver or Gold Membership only.