legal ground
Article 39 of the Lawyers Law: A lawyer shall not act as an agent for both parties in the same case, nor shall he act as an agent for legal affairs that have conflicts of interest with himself or his close relatives. The Supreme People's Court's Interpretation on Several Issues Concerning the Implementation of the Criminal Procedure Law of People's Republic of China (PRC) Article 35 The defendant shall entrust no more than two defenders. In a case of * * * joint crime, a defender may not defend more than two co-defendants.