On Sep. 21, Dr. Lv Zejie returned to our group to visit the teachers and students. Dr. Lv was a PhD student under the supervision of Prof. Xi and Prof. Zhang, focusing on the nitrogen fixation and the chemistry of carbon-rare earth metals. He made significant contributions during his PhD studies. At present, he is doing postdoctoral research in Sven Schneider's group at the University of Gottingen, Germany. Warmly welcome Dr. Lv to visit the group!