Definition: Move steadily do not move erratically; A requirement for internal martial arts
Traditional Writing: 欲定不欲亂
Cantonese: [juk6 ding6 bat1 juk6 lyun6]
Also known as: Yuk Ding But Yuk Luen
欲定不欲亂
雙手在子午中線上穩定地移動，雙肘更應定在子午線上，而不是無規則地亂動