精品亚洲AV三区国产毛片_国产草莓视频无码A左线观看_69国产成人精品午夜在线_国产精品一级A级理论片在线观看

　　On August 30th, the School of Management and Economics of Beijing Institute of Technology ushered in a group of 1066 graduate and doctoral students from all over the world. They will open a new chapter in their personal research career at Beijing Institute of Technology. Under the guidance of the volunteers, the 2018 freshmen completed the registration, and at 16:00, the orientation work successfully concluded.