I would not bring my primary digital devices into China!!!
​​One more word of caution - plan to wipe and reload any information device you bring to China. You cannot know what malware, trojans or compromises will be installed on it, the better to spy on you as long as possible.
Once a device was brought into China, I would never use it for confidential communications or information ever again. Kind of paranoid, but with the abilities any major spy organization has, the firmware on your computer or it's hard disk can be compromised, so even a wipe and reload does not rid the device of spyware.
Consider using "burner" devices, ones you can recycle or re-purpose for non-confidential use after your trip.