Please help me analyze whether this lawyer's agency agreement is valid ~

I think it is invalid. This agreement shall not be invalid because of fraud or obviously unfair content. It is because of Lin Lihui's usual performance, because he can tell the truth and be dirty after the incident, but because the judge gave him a lighter punishment at his discretion during the trial. It was not because of the role of the law firm that he was given a lighter punishment. Therefore, there are substantial deviations in this agreement. This agreement is a revocable agreement.