Zheng was the first person to issue a decree.

In 536 BC, the son of Zheng was equivalent to Prime Minister Zheng. For the first time, he cast the legal provisions on the iron tripod and announced them to the whole society, which is known in history as "the law of casting torture books" This is the first time in the history of China that a written law has been published. Later, Dr. Deng Zhi integrated Zheng's laws and regulations and carved them on bamboo slips, which was called "bamboo punishment".

His Bamboo Punishment is a private work, which was later accepted by the rulers and became a formal law.

Extended data:

The son produced The Book of Casting Punishment: "The book of casting punishment and the tripod are the customary laws of the country", and the relevant criminal laws and regulations were cast on bronze tripod and made public to the whole society. This is the first time in the history of China that a written code has been officially published. Promulgating the law on the tripod also shows the authority and long-term stability of the law.

Normative legal documents in the form of clauses. Statutory law custom refers to the custom or practice that is given normative effect by the competent authorities of the state in some way. Most of the existing laws in our country are written laws. Laws and regulations include not only laws formulated by the national legislature, but also normative legal documents formulated and issued by the central administrative organs, local state power organs and administrative organs within their functions and powers.