The sun rises in the east and rains in the west, but there is no sunshine. Who wrote what poem?

The sun rises in the east and rains in the west, the way is no sunshine but there is sunshine." From "The Bamboo Branch Lyrics" by Liu Yuxi, a poet of the Tang Dynasty

"The Bamboo Branch Lyrics"

Yangliu is at the level of the green river,

When I hear the sound of Lang Lang singing on the river.

The sun rises in the east and rains in the west,

There is no sunshine but there is sunshine.

The sun rises in the east and rains in the west,

This is a love song written in the form of a folk song. The willows by the river, drooping green stripes, the water in the river, calm as a mirror, the girl suddenly heard the song coming from the river, the song is so familiar, why he did not directly confess to me? This person, just like the rain and sunny weather, said the sun in the east is still raining in the west, said it is not a sunny day, but there is a sunny day, really relentless and sentimental, let a person can not be sure. This poem by eye prospect, with a harmonic pun implicitly expressed the subtle feelings of the girl.