According to the report of Beijing Morning Post, not long ago, a nearly 70-year-old famous doctoral supervisor of Central Conservatory of Music did not keep his promise of helping a girl student take the Ph.D. examination after "unspoken rules" on both money and sex with her. In this victimized girl student's complaints everywhere, the doctoral supervisor helplessly made an active confession to the discipline inspection department of Central Conservatory of Music in tears. After the media disclosed the event, the topic of "unspoken rules" in art colleges was again heatedly discussed by common people.