The Secret of the Laundry Room
Old Li is the night security guard at this chain hotel. His daily job involves strolling around and occasionally dealing with minor disputes, such as guests getting drunk and throwing up in the hallway. Recently, he noticed a strange phenomenon: young, student-looking individuals, carrying bulging bags, would check in and head straight for the hotel's laundry room.
At first, Old Li thought the students were facing emergencies during their travels and needed to wash clothes. But after several consecutive days of this, he felt something was amiss. After all, the hotel's laundry service wasn't cheap; how could the students afford it? He began to pay attention to these students. They typically only stayed one night, checking out the next morning with their bags of clothes all clean and dry.