1. Polar Research Center, Jilin University, No. 938 Ximinzhu str., Changchun City, Jilin Province, China
2. Institute of Geomechanics, Chinese Academy of Geological Sciences, No.11 Minzu Daxue Nanlu, Haidian district, Beijing, China
3. Polar Research Institute of China, No. 451 Jinqiao Road, Pudong District, Shanghai, China