On Sep 20th, Dr. Du Shanshan and his wife visited our group to meet with teachers and fellow students. Dr. Du was a Ph.D. student under the supervision of Prof. Zhang, specializing in the chemistry of white phosphorus. During his time in our group, he achieved outstanding research contributions. During this visit, Dr. Du warmly caught up with our teachers and students. He generously shared valuable research experiences, benefiting us greatly. Additionally, we all had the opportunity to tour the laboratory together, revisiting the equipment he used during his doctoral studies. Finally, we captured this special moment with a group photo, leaving us with unforgettable memories.