The Secret of Random Ring (亂環訣) by Yáng​ Bān​hóu​ (楊班侯)

亂環訣

亂環術法最難通，上下隨合妙無窮。
陷敵深入亂環內，四兩千斤招法成。
手腳齊進橫豎找，掌中亂環落不空。
欲知環中法何在，發落點對即成功。

楊班侯

"It is the hardest to understand the techniques of random ring. The top and the bottom follow each other harmoniously, its marvelousness is unlimited. Trap the enemy deeply into the random ring and use four ounces to repel a thousand pounds, the techniques are then completed. The hands and feet enter together and search for the opportunity in the horizontal and vertical movements. The attack of the random ring in the palms will not be empty. If one wishes to know what are the techniques used in the ring, emitting, falling, pointing and matching, then the success is immediate."

Based on the translation by Yang Jwing Ming (楊俊敏) presented in the book Tai Chi Secrets of the Yang Style (太極拳楊氏先哲秘要)