1, only in case something happens to the restaurant: for example, the chef cut vegetables cut to the hand, the waiter on the food fell or scalded, or improper operation of the restaurant fire injured people. Sign a labor contract you have to pay. May pay 2 times the wages.
2, according to the "Labor Contract Law": workers and employers to establish labor relations, the two sides should sign a written labor contract within one month. More than one month less than one year did not sign a contract with the workers, should pay two times the monthly wages to the workers; if full one year is not signed, then it is regarded as signed an open-ended contract.
3, responsible for all the costs of the employee's injury. If it is unfortunate that a waiter or chef was injured, but did not buy social security for employees, labor contracts have not been signed, can not be declared injured at work, can only be borne by the restaurant medical, nutrition costs. In case they are not satisfied with your compensation, apply for labor arbitration, but also to pay double wages, and make up for the social security; in case the chef or waiter is disabled, the restaurant's losses will be greater.