Legal analysis: contact the judge first. Generally speaking, you can submit the power of attorney to the judge. You can read the paper with the lawyer's own lawyer's practice certificate or the letter of introduction from the law firm where the lawyer is located and the power of attorney submitted to the parties or their families. However, it should be noted that if the criminal case has reached the trial stage, you can go directly to the court to read the papers, but you need to contact the responsible judge first.
Legal basis: Article 40 of the Criminal Procedure Law of People's Republic of China (PRC). From the date when the people's procuratorate examines and files the case, the defense lawyer may consult, extract and copy the case file. Other defenders may also consult, extract and copy the above materials with the permission of the people's court or the people's procuratorate.