legal ground
Article 146 of the Civil Code
A civil juristic act in which the actor and the counterpart have false meanings is invalid.
The validity of a concealed civil juristic act with false intention shall be handled in accordance with relevant laws and regulations.
Article 147
Based on serious misunderstanding, the actor has the right to request the people's court or arbitration institution to cancel the civil juristic act.
Article 148
If a party commits a civil legal act that goes against its true meaning by fraudulent means, the injured party has the right to request the people's court or an arbitration institution to cancel it.