'Li' is physical force derived from the working of the muscles, tendons, and skeletal system. These movements generally involve the whole body and in Yin Style Bagua there are basically five ways to achieve this without breaking the principles of being an internal art. Note that many strikes contain the overlapping of one or more forces.

I. 逆力Ni Li ( Opposing, Moving against )- This force generates a scissors like effect when the upper and lower body oppose each other, stretching and twisting the major muscles and tissues of the torso. The power arrives when the body snaps back into its natural state. This force is circular and on a relatively horizontal plane.

II. 順力 Shun Li ( Unifying, Moving with )- This force generates a whole-body power when all the separate parts are moving in unity and in the same direction. The shoulders, waist, and hips will all be in time and in perfect unison. This force is also circular and on a relatively horizontal plane.

III. 含力Han Li ( Concaving, Containing )- This force is circular but can be done on horizontal, diagonal, and vertical planes. Its done through a combination of the lengthening and contracting ability of the spine/torso and the ability of the arms and shoulders to work in unison.

IV. 挺力Ting Li ( Straight, Driving )- This force is generated at the back foot, which then travels up the leg to the tailbone and then outward in any direction in a relatively horizontal plane. The power comes from the connection between the hand and the lower spine, any line of force can be traced back through the arm to the lower spine and then to the ground. The back foot is strongly rooted and the joints of the arm are held immovable through the strength of the tendons and ligaments.

V. 登力Deng Li ( Spiraling)- This force comes from the legs and their connection to the ground, it is done in a circular manner and usually on an upward diagonal plane. The power comes from the foot, spiraling or corkscrewing upward through the legs, hips, torso, and finally through the arms and upon meeting resistance it traces the same route back to the ground. It can also be done by using the hinge joint power of the leg which is a sixth type of force called Beng. Which roughly translates as a popping force. This force sends a straight abrupt stopping force along a horizontal plane through the body. Since both of these forces involve the use of the legs and are interchangeable but not combined, they therefore count as one force.