Yang Zhang swung from one tree branch to another, he had no real destination, but he followed Xi Feng's instruction to follow the river. He found it dumb that he didn't even think about it, but he blamed his life in the shelter.
Ability users could not drink water from a river or lake because it had been contaminated and mutated almost all the marine life and killed the rest that hadn't mutated yet. Unless they had a purifying ability like Katarang, they had to drill underground to find a water source.
So following this river would definitely lead him to an old village infested with zombies.
Yang Zhang was dazed along the way. He was swinging automatically from one tree branch to another until he heard the cry of a zombie nearby.
Yang Zhang stopped swinging and perched on a tree. He waited for the cry again to see the direction of where he should go next.
GROAAHHH!
'Left!'
