For buffets, of course Amazon is the best. The prices of Amazon are different in each place, but they are all about the same. The one on the top floor of Yongle Appliances on Xueqian Street seems to be 59 for lunch and 79 for dinner. The one on Wuai North Road is cheaper, it seems to be more than 40 for lunch and more than 60 for dinner (in fact, the dishes at lunch and dinner are similar, but more people eat at night, so it's more expensive). There are also two Amazons in the Oriental Paris Plaza opposite the Sanfeng Restaurant on Chongning Road, which are also 59 and 79. If you want to eat a self-service hot pot, there is the Arc de Triomphe on Oufeng Street, and there is also a self-service hot pot for one person in Chong'an Temple. If you want to eat a self-service barbecue, you can go to Oufeng Street, where there is a square next to a Walmart supermarket with many barbecues, such as Brazilian barbecue and Baidu barbecue~~