On June 6, many group members came to Yuyinshanfang (余荫山房) to celebrate and witness the graduation of Nigar (PhD), Bolong (PhD，张伯龙), Jiali (MSc, 徐佳栎) and Guoqing (MSc, 官国庆).  This serial event has been the ‘official’ ceremony of our group, and we will insist on managing it. It is one of the greatest and most exiting moments for the four awardees, that with the degree gowns on it denotes a success and highlight milestone in their lifetime. Congratulations!