Large cash amount into China

Hi, I need to take $10000 or little more to pay cash to different suppliers in China. Advance payment is not possible as I need to see and select items to buy. At the airport, besides filling customs declaration forms and some supporting papers, is there any duty/fees/fines that I will be liable to pay? Don't mind the extra time at airport, but don't want to pay money to take money in. On way out, the usd amount Willie minor. Thanks in advance. PP