is it ok to take chinese currency out of china. and if so, how much?

10 second search on google

15 if the firewall is playing up...

it's 20,000RMB lat time i checked, anything over and the customs officer can take the lot. Plus $5,000, but make sure you take into account the ballache in changing all this up, seeing as us 外国人's can only do $500 a time