At the beginning, when I saw the incident of "Beijing Institute of Technology", I thought Xiao Chang was a woman, and I wondered why he named a man, thinking that she and Gong Lin were homosexual. Later, I saw that he was indeed a man, but his hair was longer. Then I thought he was kept by Gong Lin, and his sexual orientation was normal, but he was older than him. Later, I saw that Gong Lin was actually a man, and she was really homosexual, but she didn’t know who was 0 and who was 1?