I went to there with chinese trave agent before. If you follow them with all meal, you have to pay addtional $150 - 300 (not rerember how much I paid) per person, because they always select very expensive restaurant, some lunch could be more than $40.
if you do not want to pay that much for meal, you have to order food by yourself. you can follow some perople who can speak both chinese and english in same trip.