To enable shen or spirit to rise to the top of the head, the head must be upright.
Lower the chest, raise the back
Lower the chest means the chest is drawn in to enable chi to sink down to the dan tian. Raising the back means chi focusing on your back.
Loosen the waist
Loosening the waist enables your feet to be strong so that your stance is stable.
Differentiate between 'apparent' and 'solid'
If the whole body-weight is over the right leg, the right leg is 'solid' and the left leg is 'apparent.' If the whole body-weight is over the left leg, the left leg is 'solid' and the right leg is 'apparent.'
Sink shoulders, drop elbows
Sinking shoulders means that both of the shoulders are relaxed and dropped down naturally. Dropping elbows means the both the elbows are relaxed and dropped down naturally.
The ten important points of Tai Chi Chuan
This is a list of master Yang Deng Fu's ten important aspects of the practice of Tai Chi Chuan.