Legal analysis: The following are commonly used contract numbering methods: classification numbering setting, which mainly classifies contracts according to different types, and generally consists of abbreviations of the first two capital letters of contract types, such as LD for labor contract, DK for loan contract, ZL for lease contract, etc. The date number setting is mainly composed of dates, and the date of signing the contract is used as the source of the number. By setting the department number, contracts can be allocated by department, and the initials of department names are used as abbreviations to distinguish them.

Legal basis: Article 703 of the Civil Law of People's Republic of China (PRC) is a lease contract in which the lessor delivers the leased property to the lessee for use and profit, and the lessee pays the rent.