/r/internal_arts
A sub-reddit for the "internal" arts, of which there are many. The "Big Three" are: Xingyiquan, Baguazhang, Taijiquan
Other subreddits you might enjoy:
Martial Arts
Kung Fu
Taijiquan
Baguazhang
Hsing-i (xingyi)
Bajiquan
True Qigong
Kuo Lien Ying