Have you come to China now??

I just saw your question.

I have never ever been questioned about how much cash I have when entering China. Actually, there is not even a Customs form to fill out, unlike the US. So you are not writing on a form that you only have 4000, or 5000..... which would then mean you lied.

Just bring it with you, and don't carry a ton of bags that make it look like you are smuggling things. That is about only time someone might inspect your bags.