Road bike "swing" skills? What is the correct posture ~?

Shake the car? Rocking is a professional technology, which is different from ordinary mountain bikes? Rocking cars are generally used for attacking on flat roads and mountain roads or riding for a long time to relieve the pressure on the buttocks. Generally, when rocking the car, what time should I keep first ~ ~? In fact, the car body will not swing from side to side, but the car will swing from side to side. For example, if your right foot steps on the right side of the car, it will swing down moderately. The second skill depends on the coordination of the body. Generally, the body center of gravity will be placed on the front side of the car, and it will switch back and forth from left to right. The third point is also the key ~ pace, pace ~ rocker can not use too heavy gear, of course, can not be too light. How to control the gear depends on the actual operation.

Is this a picture of my brother? I wish the landlord can train himself with peace of mind and let himself and his car challenge themselves in the future!