Is it legal for a criminal lawyer to agree with the defendant on how much to charge for several years?

Illegal. This behavior is suspected of violating the Lawyers Law of People's Republic of China (PRC) and the Criminal Law of People's Republic of China (PRC). According to Article 43 of the Lawyers Law of People's Republic of China (PRC), "A lawyer shall perform professional ethics according to law, and shall not commit any of the following acts: (6) colluding with the parties to engage in fraud, extortion or illegal profits." Article 383 of the Criminal Law of People's Republic of China (PRC) also stipulates: "Whoever, by taking advantage of his position, forces others to pay fees or accept property given by the other party, or illegally accepts property given by others in other ways, if the amount is relatively large, shall be sentenced to fixed-term imprisonment of not more than five years or criminal detention." Faced with serious consequences such as administrative and criminal punishment and revocation of lawyer's license, it has a great impact on his reputation and career prospects. It is suggested that the defendant seek legal and compliant defense services to safeguard his legitimate rights and interests.