<span class="chinese-post-title">上下相隨</span> Top and Bottom Mutually Follow Each Other from <span class="chinese-post-title">太極拳十要</span> The Ten Important Points of Tai Chi Chuan

上下相隨

上下相隨者，即太極拳論中所云︰«其根在腳，發于腿，主宰于腰，形于手指，由腳而腿而腰，總須完整一氣»也。手動，腰動，足動，眼神亦隨之動。如是方可謂之上下相隨。有一不動，即散亂也。

楊澄甫

"The meaning of “top and bottom mutually follow each other” is in what the Taijiquan Treatise says: « The root of the movement is in the feet, it develops through the legs, it is ruled by waist, and manifested by the fingers. From the feet to the legs, and to the waist, it must be integrated with one completely unified Qi.» The hands move, the waist moves, the feet move, the eyes direction move accordingly. In this situation it can be said the top and the bottom mutually follow each other. If there is a place that does not move, then it can be called disordered."

By 楊澄甫 Yáng Chéngfǔ, based on the translation by 楊俊敏 Yang Jwing Ming presented in the book 太極拳楊氏先哲秘要 Tai Chi Secrets of the Yang Style and various translations on the internet