Contracts play an important role in social communication, and China is one of the countries where contractual relationships have developed earlier. The earliest form of contract was an inscription on bronze ware, such as the "Inscription on the Five Sacrificial Guard Tripod". With the passage of time, the types and forms of contracts have become increasingly diverse, but their core purpose has always been to clarify the rights and obligations of both parties in order to maintain the stability of social relations. The extensive use of contracts in China's history indicates that honesty and trustworthiness are traditional virtues of the Chinese nation. For example, Sima Guang's "Records of the Wushui River" recorded the horse buying and selling contract between Wang Deyong, the military governor of Wuning, and Chen Gui, a horse merchant, reflecting the important role of contracts in ancient society.