Under the legal framework, lawyers have the right to investigate WeChat chat records, but they must obtain the consent of the parties in advance and conduct investigations through legal means. Lawyers can obtain other relevant evidence according to law, such as the company's industrial and commercial files, vehicle files, housing files, population files and so on. Support case investigation and legal procedures with the letter of introduction and lawyer's certificate of law firm. It is very important to emphasize the use of legal means to safeguard the rights and interests of the parties and protect privacy.