Who is the best criminal lawyer in Beijing?

My father's case was defended by lawyer Li Yang. When I was in court, I especially dared to say that the prosecutor was a bunch of things I couldn't say. There is a video of her trial on the Internet as evidence. Our local lawyers dare not say anything. Originally, the procuratorate suggested a five-year sentence, but Lawyer Li Yang invited professors from Peking University, Tsinghua and University of Political Science and Law to give us an expert argumentation report. After reading our expert argumentation report, the judge said that it needed to be discussed by a collegial panel. I didn't expect the expert argumentation report to be so useful, and I was finally sentenced to probation for one and a half years.