Article 365 of the Contract Law of People's Republic of China (PRC) stipulates that "a custody contract is a contract in which the custodian keeps the deposit delivered by the depositor and returns it."

Article 37 of the Tort Liability Law of People's Republic of China (PRC) stipulates that "managers of hotels, shopping malls, banks, stations, entertainment places and other public places or organizers of mass activities who fail to fulfill their security obligations and cause damage to others shall bear tort liability. If the behavior of a third party causes damage to others, the third party shall bear the tort liability; If the manager or organizer fails to fulfill his security obligations, he shall bear corresponding supplementary responsibilities. "

However, there is a premise: if the gym posts the membership code "Do not store valuables ..." in its fitness place, it means that the gym has fulfilled its duty of safety warning, prompting that valuables such as cash cannot be stored in the locker, so the gym is not at fault for the loss of items in the locker advocated by An Zai.