What kind of poetry genre is "Looking at the Sea"?

Viewing the Sea is a four-character (Yuefu) poem written by Cao Cao, a poet in the late Eastern Han Dynasty. This poem was written by Cao Cao when he climbed Jieshi Mountain on his way to the victory class in Wuhuan. The poet used the magnificent scenery of the sea to express his ambition and broad mind. Judging from the genre of poetry, this is an ancient poem; From the way of expression, this is a four-character landscape poem.

Original text:

On the east coast, climb Jieshi Mountain to see the vast sea.

The sea is so vast that the islands stand high on the sea.

Trees and paraquat are very lush. Autumn wind makes trees make sad sounds, and the sea is surging.

The movement of the sun and the moon seems to come from the vast ocean.

A trip to the sun and the moon, if unexpected;

Han is a talented star, if you take him by surprise.

Fortunately, even! Sing with ambition.

Appreciate:

This poem is a magnificent picture of the sea when Cao Cao climbed Jieshi Mountain and watched the sea with a lot of romantic passion. It depicts the magnificence of the motherland's rivers and mountains, not only the magnificence of mountains and seas, but also the enterprising spirit of the poet who lives by heaven and cares for the world. The whole poem is concise in language, rich in imagination, magnificent, desolate and tragic.