Want to known song name form this vdieo

[swift swan]

https://youtu.be/ajslYn1Igps?si=Wcyc3ZEnfKzUBIoE

[magic plank]

This is 《白月花红》, the closing theme song of 《狐妖小红娘》, and is sung by 李宏毅. Here's the full song with lyrics from his official Youtube channel: https://www.youtube.com/watch?v=rXbgo0s5rsw
The bit used in the video you posted is the chorus, which appears for the first time at 1:29 in the singer's lyrics video.