A Connected Neck

龜縮頸，耕牛之力

The tortoise pull back its neck, the power of the ploughing ox

頂要懸

The crown of the head is suspended

A connected neck improves direction and balance.

Flexible Lower Back

坐胯，轉腰，圈襠步

Sitting the hips, twisting the waist, rounded crotch step

襠胯宜提緊，須玩兑澤之情*
Crotch and hips shall lift and keep tight, having to play in the swamp of passions 

Wiggling one's bum is the flexibility needed in one's lower backbone.

Greenish Black And Blackish Green

劍走青，刀走黑

The sword goes green, the sabre black.

Green because of the homophony with the character for light.