North gate. Longdong College is located in Qingyang City, Gansu Province. The back door of Longdong College is the north gate of the college. The back door doesn't have the exact opening time. The school is a cooperative institution of Lanzhou University, East China Normal University and other institutions, and has established inter-school cooperation and exchange relations with 13 institutions such as northern arizona university, Humboldt State University and Mansfield University.