1, lawyers should abide by relevant regulations when obtaining materials from public security organs. When a lawyer requests materials from the public security organ, he must bring the power of attorney of the parties, the letter of introduction from the law firm and the lawyer's practice certificate to the relevant department of the public security organ or the legal department for handling.
The above two books and a letter are indispensable. If the transferred materials involve criminal cases under investigation, the public security organs shall not provide them.