Kuandian Manchu Autonomous County, Dandong City. According to relevant information, Changhe Island National Defense Education Experience Park is located in Kuandian Manchu Autonomous County, Dandong City. Changhe Island National Defense Education Base has the functions of education, experience, quality development, learning and entertainment. It is an activity platform to serve, unite and educate the majority of minors, a practical classroom to promote the all-round development of teenagers and an activity base for experiential education.