"Dang".

According to the query on Kugou Music, "Let us be the companions of this mortal world" are the lyrics of the song "Dang". "Dang" is a song sung by Power Train, with lyrics written by Qiong Yao, music composed by Zhuang Lifan and Guo Wencong, and arranged by Tu Ying. It was first included in the soundtrack album "My Fair Princess? The Sky Tears Qiong Yao's best-selling TV series" released by Shanghua Records on September 16, 1998. It was later included in Power Train's selection released by Huayan International in April 2004. Added to the cover album "The Complete Records of Red Glory". The song is the opening theme of the TV series "My Fair Princess Part 1" and the interlude of the TV series "My Fair Princess".

Some of the lyrics are: Let us be the companions of the mortal world/Live a carefree life/Ride a horse and enjoy the prosperity of the world/Sing out the joy in your heart while drinking wine/Seize the youth with vigor.