After running several dozen li, Zhang He removed the silvery gray armor he was wearing and replaced it with a set of pitch-black heavy armor. The silver long spear was also swapped for a jet-black pure steel spear, and the helmet with a black plume was substituted for his original one. The fake white face paint was washed off with water, wiped with a handkerchief, and once again his skin regained its natural bronze hue.
As for the two mustaches, he didn't bother with them. Once Zhao Yun and Guan Yu joined forces and truly faced Zhang He, he would definitely sport a big beard. By then, even if Zhao Yun encountered him face-to-face, he would definitely not realize that it was him in disguise.
This was also why Zhang He did not launch a night raid—an important consideration. Perhaps the night served as the best cover, but because it was night, many things could not be seen clearly, which would cause people to think more.