Extended data:
The subject matter is a necessary clause for the establishment of a contract. Generally speaking, the subject matter of a contract can be divided into four categories:
1. Tangible property refers to assets in the form of specific material products such as money, inventory, machinery and equipment.
Second, intangible property, relative to tangible property, intangible assets are non-monetary property without physical form. Intangible property mainly includes people's intellectual achievements, such as patents and trademarks.
3. Labor service refers to the labor or service that provides some use value for others. Labor service can not only meet people's material needs, but also meet people's spiritual needs, such as maintenance behavior in maintenance contracts.
Four, the work results, refers to the tangible or intangible things produced in the process of contract performance, reflecting the performance of the contract. Such as the design drawings completed in the design contract.
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