In December 2022, Shuaibing Zhang very successfully defended his PhD thesis! During his beforehand preparations and study time, the PBT group members also prepared for this day: Bing’s graduation hat was assembled as well as the unique PBT graduation trolley on top of which he celebrated the success. After a ride through the institute, it was time for cake and sparkling wine. In the evening, he completed his graduation by fulfilling the Jena PhD tradition of throwing a floral wreath on top of the Hanfried statue at the market place. Hanfried (= Johann Friedrich I.) was the founder of Jena University. Lots of spectators and cheers due to Christmas market taking place at the same time!