'Open Plains') is a county-level city in the northeast of Liaoning, People's Republic of China, bordering Jilin for a small section to the north.

It is under the administration of Tieling City, the centre of which lies 33 kilometres (21 mi) to the southwest.

[2] Subdistricts: Towns: Townships: Kaiyuan is situated in northeastern Liaoning in the southeastern part of Tieling City on the eastern bank of the middle reaches of the Liao River.

In the east, the land begins to transition to the foothills of the Changbai Mountains, while the west is marked by the Songliao Plain.

A majority of the annual rainfall of 673 mm (26.5 in) occurs in July and August alone.