What school of poetry is Wang Wei's To the Frontier?

The poetic genre of Wang Wei's "To Frontier fortress" is: five-character verse.

Go to the frontier to carry out tasks

Wang Wei

Riding a bike to visit the border and passing through Juyan County.

Levy Peng, return the geese to Wu.

The vast desert is lonely, and the Yellow River sets the yen.

When I arrived at the small pass, I met a spy waiting for the knight and told me that Dou Hu was in Yan.