Lawyers must pass the legal professional qualification examination and obtain the lawyer's practice certificate according to law before they can legally practice. According to the different nature of work, lawyers can be divided into full-time lawyers and part-time lawyers; According to the different business scope, lawyers can be divided into civil lawyers, patent lawyers (double-certificate lawyers), criminal lawyers and administrative lawyers; According to different clients and working status, lawyers can be divided into social lawyers, corporate lawyers and public lawyers. The lawyer's business is mainly divided into litigation business and non-litigation business. Lawyers, as legal professionals, are committed to providing legal advice, representing litigation, drafting legal documents and other legal services to clients and safeguarding their legitimate rights and interests.