See this fascinating story about yiquan.

Mentions how kyokushin has some influence from yiquan and Kenichi Sawai’s related art, taikiken. Also yi quan encounters and influence from western boxing, while retaining a strategy of whole body power and off balancing, with an idea of exploiting a boxing guard against the boxer. Covers the difficulties from the cultural revolution and the rise of wushu and sanda that lost all emphasis on the “internal” traditional aspects, even the ones that proved more effective in sanda. Interesting emphasis on zhan zhuang yet also on sparring. Sounds like great fun.