Where can I get a more traditional, halal Peking duck in Beijing?

I am a Beijinger, a Muslim, and a Muslim. To note, all the Quanjude in Beijing are non-halal. Generally we go to regular halal certified restaurants to eat roast duck, Ziguangyuan is considered to be Beijing halal home cooking in the better, there is roast duck. Other long-established halal restaurants also have some roast duck. For example, Nan Lai Shun what. By the way, Ziguangyuan has many branches in Beijing, better dining