According to the relevant regulations of China's catering industry, there is no clear limit on the area of teahouses. In fact, the area of teahouse can be determined according to business needs and market conditions. Generally speaking, 90 square meters is enough to open a small teahouse, which can accommodate a certain number of seats and equipment. The success of a teahouse depends not only on its area, but also on its management, product quality and service level. So a teahouse can be opened in an area of 90 square meters.