QUANG HUNG TRAN [ORCID 0000-0003-2468-4972] received a bachelor of science degree in pure mathematics in 2008 and a master’s degree in pure mathematics in 2011 from the Vietnam National University. He is a geometry teacher at the High School for Gifted Students (HSGS) of the Vietnam National University. His main interests include several branches of geometry, such as the history of Euclidean geometry, non-Euclidean geometry, multidimensional Euclidean geometry, analytic geometry, and projective geometry. When not teaching and doing mathematics, he enjoys reading and spending time with his family.