It's possible, but this behavior is a serious violation of lawyers' professional ethics. If the plaintiff finds similar evidence or clues, he can complain to the judicial bureau where the lawyer is located. Once verified, the lawyer will be punished and take responsibility.
Legal basis:
Article 49 of the Lawyers Law of People's Republic of China (PRC), if a lawyer commits any of the following acts, he shall be punished by the judicial administrative department of the people's government at the municipal level or municipality directly under the Central Government, and may be fined up to 50,000 yuan. If the illegal income is serious, the judicial administrative department of the people's government of a province, autonomous region or municipality directly under the Central Government shall revoke his lawyer's practice certificate, and if the case constitutes a crime, criminal responsibility shall be investigated according to law:
(a) meeting with judges, prosecutors, arbitrators and other relevant staff in violation of regulations, or affecting the handling of cases according to law in other improper ways.
(2) offering bribes to judges, prosecutors, arbitrators and other relevant staff members, introducing bribes or instigating or inducing parties to pay bribes.
(3) Providing false materials to the judicial administrative department or committing other fraudulent acts.
(4) Intentionally providing false evidence or threatening or inducing others to provide false evidence, which hinders the other party from obtaining evidence according to law.
(5) accepting property or other benefits from the other party, and maliciously colluding with the other party or a third party to infringe upon the rights and interests of the client.
(6) Disrupting the order of courts and arbitration tribunals and interfering with the normal conduct of litigation and arbitration activities.
(seven) inciting or instructing the parties to take illegal means such as disturbing public order and endangering public security to resolve disputes.
(8) making statements that endanger national security, maliciously slander others, and seriously disrupt the court order.
(9) divulging state secrets.
If a lawyer is subject to criminal punishment for intentional crime, the judicial administrative department of the people's government of a province, autonomous region or municipality directly under the Central Government shall revoke his lawyer's practice certificate.