"I Don't Regret". According to the official website of NetEase Cloud Music, this sentence comes from the song "I Don't Regret". The lyrics are "If you make a promise, you won't look back. If you don't want to make a promise, don't overdo it when your fate is over." "I Don't Regret" is a song sung by Gu Feng The song, written by Siqin Gaoli, is included in the album "Gu's Love Song".