李雅轩给徒弟徒孙改拳时，经常做的就两个动作：一是沿着脊椎，从领口到尾椎，手往下一刷，提醒徒弟注意脊椎一定要直；二是，把膝盖往外搬，开胯。这两个地方，就是内功的最关键，几乎是全部了。
When Li Yaxuan helped his disciples and followers to correct their forms, he often did these two actions:
1. He would brush his hands along their spines from their neckline to their tailbone, reminding them that the spine has to be straight;
2. He would also adjust the position of their knees to open the Kua. These two points are essential for Neigong. You could even say, they form almost all of it.
*Li Ya Xuan (1894 -1976) was a top disciple of Yang Cheng Fu.
