The First is the Moving Skills gather the strength, nourish the Qi, & complete the Shen. This is called the Luohan Reaches Enlightenment Skill, one hundred days of practice will suffice to succeed.
The Second is Pushing & Holding Sandbags, the grasping refines the fists & palms.
The Third is Practicing the Hand Methods of the Various Families. These are called the Three Vehicles. As for Dividing Muscles & Stopping Vessels, the principle follows opening or restricting. This is the study of Human Nature & Natural Law.