Yuk Jui But Yuk San Move to converge rather than diffuse out; A requirement for internal martial arts. Traditional Writing: 欲聚不欲散 http://wingchunlexicon.com/wp-content/uploads/2016/12/JUK6-ZEOI6-BAT1-JUK6-SAAN3-_mdash-Wing-Chun-Elements_-Glossary.mp3