This knot is tied like this. After holding the rope in your left hand, turn your right hand counterclockwise. After the left hand holds the circle, the right hand makes another circle in turn. In each circle, you should turn the first circle upside down, so that you can see two circles, and the heads of two ropes come out in both circles, not in one direction, but in the right direction. This knot is getting tighter and tighter, and it is easy to be beaten every step.