according to article 6.2.3 of code for fire protection design of buildings (GB51116-2114), the kitchens of food and beverage stores in shopping malls are required to be equipped with fire walls with a fire resistance limit of not less than 2 hours, and Class B fire doors and windows. When it is really difficult, fire shutters can be used, but the doors leading to shopping malls are not required to be fire doors, because most food and beverage stores in shopping malls are decorated with glass partitions, and their partitions are not firewalls, so fire doors are provided.