The first song for this arc is called 光年之外 (Light Years Away). This song was composed and performed by G.E.M. who is a Hong Kong singer, songwriter, and actress that has a very beautiful and unique voice. This song is sung in Mandarin and is the theme song and end credits song for the Chinese version of the movie Passengers. G.E.M. had composed this song after watching the movie multiple times and writing up many different drafts.
Here’s the original music video for those who are interested.
And you can find the full post here.