A princess generally refers to a waitress who serves in a box. The main job is to order songs, order food, pour wine and clean the table in the box. Young master, generally refers to the male waiter who serves outside the box. The main job is to deliver drinks, do peripheral service at the door of the box, and be hygienic. Customers mainly refer to welcoming guests, arranging boxes according to the requirements of guests, or receiving reservations!