Seeing Feng Wu let Zhi Yue approach him, is proof enough that this young man is indeed someone that serves their little brother Feng Jing. After all, Feng Wu is an aloof type. He would never initiate something like approaching someone. He would only stand in the side waiting for his master, Feng Jing to give him orders. He is like a background character and was silent in nature making it hard for others to approach him. Unless you are used to him or someone he knew, Feng Wu would choose to ignore you all the time.
"Yue? Why are you here? Where's the lord?" asked Feng Wu as he frowned a bit.