Where does Wu appear in Black and White Dragon?

Wu appears in Chapter 39 of Black and White Ssangyong. At the beginning of chapter 39 of black-and-white Ssangyong comics, a mysterious young man appeared, who also came from Xuanwu. If you look at him carefully, it is the token of the shadow assassin, which probably means that he can't live without the leader. It turns out that he is the assassin Wu Wushuang.