Recently, a research team led by Prof. Yang Shangfeng from the University of Sciences and Technology of China (USTC) of the Chinese Academy of Sciences (CAS) synthesized La@C81N, a type of monometallic endohedral azafullerene (MEAF) for the first time, providing a new way to modulate the electronic properties of metallic endohedral fullerenes through skeletal modifications of the carbon cage. Their work was published in Journal of the American Chemical Society.