drinks need to be returned according to regulations.

when the customer checks out through the waiter, the waiter must check the remaining drinks and return them through the menu treasure. When the customer checks out at the bar, the bartender must ask the customer if he has any drinks to return. If yes, ask the waiter to check the remaining drinks and return them through the menu treasure. The bartender checks out after seeing the drinks returned by the waiter enter the system, and returns the drinks to the warehouse according to the number of drinks returned. Barmen are not allowed to return drinks at the front desk without special circumstances. The restaurant manager and the day foreman are responsible for supervising the above processes.