Kuānhé
Kuanhe lies in the mountains of the Luan River basin. The river from which it takes its name, also called the Pu or Bao River, flows south through a narrow valley to join the Luan. In 1389 the Ming established a military command of a thousand households at Kuanhe, making the settlement part of the empire's northern defensive network. The river valley offered a route through the surrounding hills.