According to Article 3 1 \ 33 of the Lawyers Law of People's Republic of China (PRC), lawyers acting as defenders shall, according to facts and laws, put forward materials and opinions on whether the criminal suspects and defendants are innocent, their crimes are light or their criminal responsibilities are reduced or exempted, so as to safeguard their legitimate rights and interests. From the day when the criminal suspect is interrogated by the investigation organ for the first time or compulsory measures are taken, the entrusted lawyer has the right to meet the criminal suspect and defendant with the lawyer's practice certificate, the certificate of law firm and the power of attorney to learn about the relevant situation.