There wasn't a problem if it was plainly walking for 15 days. But, this area was filled with poisonous snakes and terrestrial leeches. Not only that, but you might also meet people who were exchanging drugs for money! Principal Chen said that exchanges of firearms always happened in this area. Sometimes, border guards might appear here too.
She hadn't met any transactions or border guards but she met many poisonous snakes and terrestrial leeches!
Leeches were especially common during the monsoon season. She covered her body tightly but she was still bitten twice on her neck. By the time she felt the pain, the leeches had already finished sucking her blood. When she flicked them off, the black and slippery terrestrial leeches were at least two times bigger than normal water leeches. Their bodies were round from sucking her blood.