Cloud Wind Body was a skill that buffed the user's senses. It gave the user greater control over qi and allowed the user to sense their targets with qi. Boundless Sea's sudden acceleration wasn't a result of Cloud Wind Body, but rather a different skill: Qi Flowing Cloud.
Qi Flowing Cloud increased the Qi Master's speed in every way: movement speed, attack speed, cast time, and so on. Fang Rui's Boundless Sea had two buffs stacked on top of each other, Cloud Wind Body and Qi Flowing Cloud. As a result, he sped up and had greater control over his increased speed. He just barely brushed past Chaotic Cloudy Mountain's fingertips, narrowly escaping from the danger. However, with this dodge, Chaotic Cloudy Mountain was instantly left behind him.
Lu Boyuan knew that this spelled trouble. By the time Chaotic Cloudy Mountain turned around, Boundless Sea was already two body lengths away from him.
Two body lengths...
The King’s Avatar: For the Glory prequel movie, about Ye Xiu meeting the Su siblings and Excellent Era’s rise to the top in Season 1, releases in theaters in China today! An English subbed trailer can be found here: https://www.youtube.com/watch?v=gjvEc6j93ic