Yes, provided of course that:
 - in using the term 'good profit', you are referring to Chinese Remimni (CNY); and
 - you have a bank account within the China Local Market Bank network to withdraw the excess CNY funds to; and
 - that you are content holding the CNY 'profits' within China indefinitely.

If say, you would like to repatriate ex-China, for instance to send to Bitstamp, then you would have to factor cost of doing this (say 25-50%).  If you do not have a local market bank account, you just need to sort out trading license for foreign-owned corporation, easy stuff $250k. Lastly, you might note CNY has official exchange rate but, in practice FX conversion is occur at rate ~10% less favorable.