Lin Yu has been complaining to his friend Shen Nanxun recently.
"My roommate is very strange. He always stares at me for no reason."
"You asked me whether I should move or not. He always keeps an eye on me."
……
When Shen Nanxun and Lin Yu returned home and asked him where his roommate lived, Lin Yu pointed to a locked room, "This is it."
"This room?" Shen Nanxun was in disbelief. After finding the key and opening it, his eyes looked strange, "This is a utility room..."
Purpose: Being on guard against others is indispensable
