All these sumptuous business meals make overeating in China a common place. During those meals you may want to express you’ve eaten enough. To indicate to your business partner you’re satisfied, you first have to overcome his/her encouragement to eat more ???? (chi1 duo1 yi4 dian3). You can reply with the phrase I’ve eaten enough, thank you (chi1 hao3 le, xie4xie4). I would advise you to also compliment the food here, by saying : These dishes are wonderful! (zhe4 xie3 cai4 fei1 chang3 hao3 chi1).