This we call the ants on the tree, this play on the bamboo has a requirement, the bamboo must be fixed axis, that is, without bearings, so that the bamboo will climb online.

After choosing a good empty bamboo, we just need to fully accelerate the empty bamboo, and then the left hand is raised, the right hand in the empty bamboo shaft wrapped around a circle, and pull the line tightly with force, so that the empty bamboo will go along with the line online.