Legal analysis: you can prepare relevant evidence, such as the signed training contract and other materials, write a complaint and submit one according to the number of defendants. The complaint shall contain the following items: the plaintiff's name, gender, age, nationality, occupation, work unit, domicile and contact information, the name and domicile of a legal person or other organization, and the name, position and contact information of its legal representative or principal responsible person; Information such as the defendant's name, gender, work unit and domicile, and information such as the name and domicile of a legal person or other organization; The request and the facts and reasons on which it is based; Evidence and sources of evidence, names and residences of witnesses. Generally, the lawsuit will go to the court where the defendant is located or where he is trained, and then the procedure will be arranged by the court.

Legal basis: People's Republic of China (PRC) Civil Procedure Law.

Article 21 A civil action brought against a citizen shall be under the jurisdiction of the people's court of the defendant's domicile; If the defendant's domicile is inconsistent with his habitual residence, it shall be under the jurisdiction of the people's court of habitual residence. A civil lawsuit brought against a legal person or other organization shall be under the jurisdiction of the people's court where the defendant is domiciled. Where the domiciles and habitual residences of several defendants in the same lawsuit are under the jurisdiction of two or more people's courts, they shall be under the jurisdiction of each people's court.

Article 119 A prosecution must meet the following conditions:

(1) The plaintiff is a citizen, legal person and other organization that has a direct interest in the case;

(2) Having a clear defendant;

(3) Having specific requests, facts and reasons;

(4) It falls within the scope of civil litigation accepted by the people's court and is under the jurisdiction of the sued people's court.