1. Because the steps of demonstrating directly with the ring are unclear, here a green rope is used to represent the ring, and then a line (red and yellow) is placed under the green shaft as the rope to be wound.

2、? Place the right yellow line pressure axis on the left.

3、? The red line on the left presses the yellow line.

4. The red line and the yellow line pass under the green axis and then through the yellow circle.

5. Draw two lines and tighten them.

6. Press the yellow line on the left on the right shaft, and the red line on the right presses the yellow line.

7. The red line and the yellow line pass through the green axis and the yellow circle.

Pull both sides of the thread, and then tighten it.

8. Repeat the above steps all the time.