Max.currency i can take out of china

Hi Friends,

I am working in china, since last one year. Its difficult to send the earned money to my home town(India) , from china banks here.

I am getting monthly salary in RMB and also pay tax here, (having Tax receipt as well).

Hence I need to carry out Chinese RMB or USD to my country for exchange and deposit.

How much currency (in RMB) or in USD I can carry cash out of china. If more than limit any procedure to follow or declared anything at china airport.

Kindly advise..

Thank you Very much for your help.

Regards,
Sunil