Legal analysis: The written complaint should contain the following contents: 1. The plaintiff and defendant’s information should be clearly stated: name, gender, date of birth, ethnicity, place of birth, education level, address and other information; 2. Litigation request; 3. Facts and reasons; 4. Sources of evidence and materials; 5. Date of payment and signature.

Legal basis: Article 121 of the "Civil Procedure Law of the People's Republic of China" stipulates that the following matters shall be recorded in the complaint: (1) The plaintiff's name, gender, age, Nationality, occupation, work unit, residence, contact information, the name, residence of the legal person or other organization, and the name, position, contact, and contact information of the legal representative or principal responsible person; (2) The name, gender, work unit, and residence of the defendant and other information, the name, residence and other information of the law or other organizations (3) Litigation claims and the facts and reasons on which they are based; (4) Evidence and evidence sources, names and residences of witnesses.