During the National Day dormitory trip, I grabbed a special four-person room in advance, but my roommate Zhang Jiahao used a measuring tape to measure the size of my suitcase and forced me to pay more for room A because my suitcase took up too much space. The other two roommates also acquiesced. I laughed angrily and counterattacked, calculating the service fees for guides, looting agents, etc., But they refused to pay back and threatened me. I checked out directly, leaving them fined by the hotel and unable to stay in a room. Later, I refunded their return tickets and applied for a dormitory change. In the end, the three of them skipped classes and started fighting among themselves, while my new roommate and I started a happy college life.