Legal aid refers to a legal guarantee system that legal aid agencies set up by the government organize legal aid lawyers to provide free legal services for people with financial difficulties or special cases. Special case means that according to Article 34 of the Criminal Procedure Law of People's Republic of China (PRC), the defendant in a criminal case is blind, deaf or dumb, or the minor has not entrusted a defender, or the defendant may be sentenced to death without entrusting a defender, and should receive legal aid. Therefore, not all lawyers have the obligation of legal aid, only lawyers under certain conditions have the obligation of legal aid. 3. Under what circumstances can I apply for legal aid? According to Articles 10 and 11 of the Regulations of the People's Republic of China on Legal Aid [1], if a citizen has the following matters and does not entrust an agent or a defender, he may apply for legal aid or be appointed by the people's court to defend himself: 1, and request state compensation according to law. 2. Request for social insurance benefits or minimum living security. 3. Request for pensions and relief funds. 4. Requesting to pay alimony, alimony and alimony. 5. Requesting payment of labor remuneration. 6. Advocate the civil rights and interests arising from the courageous deeds. 7 cases of personal injury compensation caused by medical accidents, traffic accidents and industrial accidents. 8. Due to domestic violence, abuse, bigamy, etc. Cases in which the victim asks for divorce and personal injury compensation. 9. The criminal suspect fails to hire a lawyer due to financial difficulties after the investigation organ makes the first inquiry or takes compulsory measures. 10. The victim of a public prosecution case and his legal representative or close relatives have not entrusted an agent ad litem due to financial difficulties since the date when the case was transferred for examination and prosecution. 1 1. After the people's court accepts a case of private prosecution, the private prosecutor and his legal representative fail to entrust an agent ad litem due to financial difficulties. 1 2. In a case where a public prosecutor appears in court for public prosecution, the defendant fails to entrust a defender due to financial difficulties or other reasons. If the people's court appoints a defense for the defendant, the legal aid institution shall provide legal aid. 1 3. If the defendant is blind, deaf, dumb or a minor and has not entrusted a defender, or if the defendant may be sentenced to death and has not entrusted a defender, when the people's court appoints a defense for the defendant, the legal aid institution shall provide legal aid without examining the defendant's financial situation. Perhaps ordinary people will directly look at related criminal activities from the perspective of right and wrong, but lawyers are not allowed to do so. As a criminal suspect in a criminal case, even if he is extremely vicious, he has some legitimate rights and interests and should be respected by the judicial department. In the whole process, it is precisely because of lawyers that the rights and interests of criminal suspects have been fully guaranteed.