According to the regulations, one defendant can entrust two defenders to defend him, but one defender can only defend one defendant in the same case. Because there will be conflicts of interest between co-defendants, if the same defender defends two defendants in the same case at the same time, he will not be able to perform his defense duties and damage the interests of the defendants, so a defender cannot defend two co-defendants at the same time.
Code of Professional Ethics and Practice Discipline for Lawyers
Twelfth lawyers should abide by the following professional disciplines in accepting cases and business fees:
(a) shall not accept the entrustment of the parties to undertake legal affairs;
(two) shall not refuse to provide legal aid to the parties who are unable to pay the fees;
(three) shall not refuse to undertake the case of the people's court to appoint a defender for the criminal defendant;
(four) shall not accept the entrustment of the interested parties in the case;
(five) shall not accept the entrustment of the interested parties in the case, and shall apply for the dissolution of the entrustment relationship in time after it is discovered;
(six) shall not be entrusted as agents of both parties in the same case;
(seven) shall not use the way of picking words to obtain or expand business;
(eight) shall not collect remuneration or other fees from the client;
(9) It is not allowed to ask or accept extra remuneration or in-kind gifts with remuneration from the clients or their interested parties in addition to the normal business fees of the law firm;
(ten) shall not violate the law firm's charging system and financial discipline, illegally misappropriate, privately divide or occupy business fees.