"In tai chi chuan there is basic standing push hands, forward-backward push hands, dà lǜ and nine palace push hands, etc. In his later years, my older brother, Wu Kung-i (Wu Gongyi), created new techniques in applications. … The dà lǜ method of stepping is also called ‘eight gates and five steps’ (bā mén wǔ bù)."
January 1, 1970
https://en.wikiquote.org/wiki/Wu_Kung-tsao