At present, there are authentic Tai Chi by Yang and Chen. I suggest you major in it. There are many in Beijing. Chaoyang District Sports Bureau Wushu Training Center is a national martial art, or was founded by former national Wushu champion Ma Chao and famous national Wushu champion Huang Lei. With the teaching of martial arts champions, you will certainly learn very authentic and effective methods.
Guowu kungfu club
Address: Floor 2, Building 28, Laichunyuan Community, Chaolai Green Home, Chaoyang District, Beijing