At Tai Er Suan Cai Yu (Tai Er Chinese Sauerkraut Fish), there are four rules: 1. You can only have four people max at one table at a time, and no latecomers will be seated. 2. No baby chairs allowed. 3. They will not adjust the spiciness level. 4. No takeout (although this restriction has been lifted during the pandemic). Take into account these restrictions, and also the fact that queues of diners can mean a wait of close to one hour during peak mealtimes, and you wonder why anyone would go to this restaurant. In reality, Tai Er is one of China’s biggest domestic success stories with over six million fans on WeChat and Weibo (China’s Facebook and Twitter equivalents) and 120 locations throughout China.