The questioner wants to ask what song reminds him of him in the dead of night? In the dead of night, I remembered his song "You Must Be Happy" written by Tang Tian, ??composed by Wu Mengqi, originally sung by He Jie, Jian Hongyi and others. "You Must Be Happy" is a love song written by Tang Tian, ??composed by Wu Mengqi, and sung by He Jie. It is the theme song of the TV series "Beautiful Decibel". The lyrics are based on the emotional experiences of the male and female protagonists in the drama, and are extremely contagious. , contains a rich sense of picture. It was officially released on March 25, 2006. In July of the same year, it won the Mainland Golden Melody Award in the Sprite China Original Music Pop Chart Quarterly Selection. On October 19, 2012, He Jie sang affectionately at CCTV's "Golden Melody Night Concert". It was covered by mainland male singer Jian Hongyi in 2016. He Jie's original song lasts 5 minutes and 18 seconds, and Jian Hongyi's cover lasts 4 minutes and 28 seconds. It is a rare long pop music work in the mainland. Excerpts from the lyrics are as follows: I thought of him in the dead of night, the flowers he sent me, and some heart-wrenching words of love, gambling on happiness in the crowded streets.