Where does "the sky is grey, the wild is vast, and the feng shui is low to see cattle and sheep" refer to, and which period in history was it made?

(1) Chilechuan-Chilechuan people live in Pingchuan. Chile was a nomadic people in ancient times, living in present-day Gansu and Inner Mongolia.

(2) Yinshan Mountain, that is, Daqingshan Mountain, is located in the middle of Inner Mongolia Autonomous Region, and it runs east-west.

Chileger

③ Folk songs of Northern Dynasties

Chilechuan,

Under the shady mountain,

The sky is like a vault,

Cage covers four areas.

The sky is gray,

Wild,

See cattle and sheep when the wind blows.