"Look at a jasmine flower blooming in the moonlight" are the lyrics of
The ending theme of the sixth episode of River God, "Jasmine Flower". The singer is Zhou Zhengran.
There is a song at the end of the film. It's called "Jasmine", and of course it's not the song "What a beautiful jasmine". It was sung by Zhou Zhengran, but there is no information available online. It was probably specially made for the plot.