This was exactly the part Xu Huo couldn't figure out; the Skinning Artisan instance wasn't a closed instance—if players could simply hide outside the factory and not enter, it didn't count as forced participation.
But what was happening before him made it clear that even if you hid outside during the day, you would definitely be driven into the factory at night!
If Peng Fengnian's information was accurate, the Skinning Artisan at night was much more dangerous than the one during the day, and players trying to take advantage by hiding outside might become the first target, making it even more perilous.
After hesitating between the pigsty and the Skinning Artisan's bedroom, Xu Huo chose the former.