Don't take electronics you don't need into China. Some employers have a policy of providing laptops with only essential data for such trips, or there may be other security regulations that you need to know in advance of your trip. You might also want to turn off all electronics (and disconnect them from the internet if applicable) when not in use in China.

IME major western chain hotels in big cities do permit access to the usual websites via their internet connections (and business centers) even though it's different at local hotels and for the general population. [BTW, I've also observed western cable news channels being censored in Chinese hotels, even western chain places oriented toward western clientele.]

IME the situation is similar in Russia, so China is not unique this way.