By the time Wang Yujing fully realized what had happened, she saw that it was Chen Feng who had controlled her punches and kicks, teaching the ruffian a harsh lesson. As for why Chen Feng didn't take action himself but went through the trouble of controlling Wang Yujing, it was naturally because he wanted to take this opportunity to guide her.
These few thieves were just minor characters who picked on the weak but feared the strong, and Chen Feng didn't even feel like paying attention to them. However, he was quite interested in Wang Yujing. Although her moves looked decent, he noticed many flaws in her technique, seeming more self-taught than trained by someone.
Seeing that they could gain nothing against Chen Feng and his company, the gang of thieves didn't dare to bother them further, hastily dragging their rolling comrade and running away without looking back.