1. Entrust a lawyer to investigate and collect evidence. 2. Apply to the court for evidence preservation before litigation. 3, report to the administrative organ for evidence collection. After reporting to the industrial and commercial and public security departments where the infringement is located, the appeal department may consult and copy the contracts, account books and other relevant documents related to the case. 4, apply to the people's court for evidence. Article 12 of the Civil Code of the People's Republic of China is infringed, and the infringed has the right to request the infringer to bear the tort liability. Article 183 If the infringer suffers damage to himself by protecting the civil rights and interests of others, the infringer shall bear civil liability and the beneficiary may give appropriate compensation. If no infringer or infringer escapes or is unable to bear civil liability, and the victim requests compensation, the beneficiary shall give appropriate compensation. Article 167 Where an infringement endangers the personal and property safety of others, the infringed party has the right to request the infringer to bear the tort liability of stopping the infringement, removing the obstruction and eliminating the danger. Article 168 Where two or more persons jointly commit an infringement and cause damage to others, they shall be jointly and severally liable.