What procedures should I go through to see a lawyer?

The Code for Lawyers' Participation in Criminal Proceedings stipulates: Article 26 When a lawyer meets a criminal suspect in custody, he shall go through the following procedures: (1) a special certificate issued by a law firm to meet the criminal suspect; (2) the lawyer's own lawyer's practice certificate; (3) Power of attorney signed by the client. Article 27 When a lawyer meets a criminal suspect in custody, he shall solicit his opinions on the lawyer he has hired. If you agree, ask him to sign the power of attorney to hire a lawyer. The first stage: the relevant documents and procedures required for lawyers to meet criminal suspects in the investigation stage 1. Lawyer's practice certificate and a copy of lawyer's practice certificate; 2. Power of attorney; 3. Letter from the law firm that the lawyer meets the criminal suspect in custody; 4 law firm issued a special letter of introduction for lawyers to meet with criminal suspects and defendants in custody; Article 38 of the Criminal Procedure Law stipulates that: defense lawyers can provide legal aid to criminal suspects during investigation; Acting as an agent for complaints and accusations; Apply for changing compulsory measures; Ask the investigation organ about the crimes and cases suspected by the criminal suspect, and put forward opinions. Article 40 of the Criminal Procedure Law stipulates that defense lawyers may consult, extract and copy the case files from the date when the people's procuratorate examines and prosecutes the case. Other defenders may also consult, extract and copy the above materials with the permission of the people's court or the people's procuratorate.