Lawyers are different from litigants and lawyers in ancient times. They refer to practitioners who have passed the national judicial examination and obtained a lawyer's practicing certificate in accordance with the law, accept the entrustment or designation of the client, and provide legal services to the client. According to the nature of work, lawyers can be divided into full-time lawyers and part-time lawyers; according to the scope of business, lawyers can be divided into civil lawyers, criminal lawyers and administrative lawyers; according to service objects and work status, they can be divided into social lawyers, corporate lawyers and public lawyers. Lawyer business is mainly divided into litigation business and non-litigation business.