Northeast Institute of Geography and Agroecology;
Chinese Academy of Sciences;
Changchun 130102;
China;
Department of Geography;
Hong Kong Baptist University;
Kowloon Tong;
999077;
Hong Kong;
China;
College of Resources and Environment;
University of Chinese Academy of Sciences;
Beijing 100049;
China;
resource-dependent cities; urban shrinkage; population change; urbanization; China;