Legal analysis: the witness of the law firm has certain effect and is binding on both parties. Since both parties voluntarily apply for witness, and the legal acts between the two parties have been witnessed, which are true and legal, the parties shall not arbitrarily change, modify or abolish the witness items, but shall consciously perform them.

Legal basis: Article 143 of the Civil Law of People's Republic of China (PRC) is valid for civil juristic acts that meet the following conditions: (1) The actor has corresponding capacity for civil conduct; (2) the meaning is true; (three) does not violate the mandatory provisions of laws and administrative regulations, and does not violate public order and good customs.