What's the difference between Wu Fang, Gan Qing and Yan Qiao?

Wu Fang is the little duke in the novel "Speaking of Heroes", and Wu Fang should look at the ruthlessness of the four big catchers. The little duke, and Xiao Qingyu, the peerless son in The Age of the World, because Li in the movie and Ouyang Mingri in Qiao Zhenyu both hit it off very well and have excellent looks, they gradually evolved into Yan Qiao or something, and, of course, in many people's lives.