Depending on the will of both parties to determine the duration of the canteen contract. Guangdong Jiayu Catering Services Co., Ltd." professional canteen contract signed from the effective date, the first 1-3 months for the contract probationary period, the probationary period, such as the emergence of unforeseen problems or factory personnel 60% of the contractor's meals are not satisfied with the contract can be terminated at any time; the probationary period after the completion of the formal contract can be factory full of intention to develop for half a year, one year, two years, three years ..... The deadline is indefinite.