Legally, it depends on whether you applied for this catering business when you registered the company at that time. Moreover, if you apply for this business, your teahouse also needs to obtain the health and epidemic prevention license from the local health and quarantine department and the health certificate of your employees. If you don't have these certificates and permits, there will be problems in starting a restaurant, especially when there are problems with the quality of the restaurant, or when consumers complain about you, because without the corresponding certificates and business licenses, it is difficult for you to win the case. The best way is to add catering business to the business license according to the regulations and apply for health-related documents.