Legal analysis: In the investigation stage, the attorney can't check the confession. Lawyers have no right to read papers in the investigation stage. They must wait until the public security organs have completed the investigation and transfer the case to the people's procuratorate. At this time, lawyers have the right to read papers so as to understand the case and defend. Legal basis: Article 35 of the Lawyers Law of People's Republic of China (PRC) may apply to the people's procuratorate or the people's court to collect and obtain evidence or to the people's court to notify witnesses to testify in court according to the needs of the case; If a lawyer investigates and collects evidence by himself, he may, with the lawyer's practice certificate and the certificate of the law firm, investigate the situation related to undertaking legal affairs with the relevant units or individuals.
article 38 of the criminal procedure law of People's Republic of China (PRC): defense lawyers may 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.