legal ground
Article 147 of the Civil Code of People's Republic of China (PRC)
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.
Article 149
If a third party commits fraud, causing one party to commit a civil legal act against its true meaning, and the other party knows or should know about the fraud, the defrauded party has the right to request the people's court or an arbitration institution to cancel it.