There are several symmetrical words for the mountain to cover the day and the sea to drain the golden river.

Eight-character symmetry.

The first word is all colors: white to yellow, the second word is everything: the sun to the river, the third word is all verbs: according to rights, the fourth word is everything: mountains to the sea.

This poem is from Wang Huanzhi's Heron Villa. The whole poem is as follows: the mountains cover the day, and the ocean drains the golden river. By going up one flight of stairs, look further.