It is the song "Lover's Heart", sung by Wei Xinyu.
Lyrics:
Turn into wind, turn into rain, turn into spring and come towards you
Dreams are like voices, dreams are like shadows, dreams are palm prints from a distance
Turns into smoke, turns into mud, turns into clouds and floats towards you
My thoughts are like the sea, my love is like the city, my longing is the most far away
You ask the West Lake water to steal her beauty
When time goes by, no one will you leave it to anyone
You ask the Yangtze River what it feels like to be so sad
Half of a lover’s heart can’t be recalled
Turn into poems, turn into pens, turn into lights, and write about you
Silently chanting and sighing at those deep words
Turn into roads, paths, and feelings to find you
One love, one dream, one longing, the most distant one
You ask the water of the West Lake to steal some of her beauty
When time goes by, no one will leave it to anyone
You ask the Yangtze River water about how it feels to exhaust one’s heart
Having half a lover’s heart left cannot be retrieved
You ask the West Lake water to steal how much of her beauty
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When time goes by, no one will leave it to anyone
You ask the Yangtze River water how it feels to be so sad
Half of a lover’s heart can never be recalled
The heart of the lover who has left half of the heart cannot be called back
The heart of the lover who has left half of the heart cannot be called back