Li, Ruiyu [P:(DE-Juel1)168240] ; Cai, Yun [P:(DE-Juel1)168222] ; Liu, Yilin [P:(DE-HGF)0] ; Xie, Ziqi [P:(DE-HGF)0] ; Wippermann, Klaus [P:(DE-Juel1)129946] ; Lehnert, Werner [P:(DE-Juel1)129883]