Nguyen Tu Nghiem and Luu Cong Nhan are famous artists belonging to two quartets in two periods of Vietnamese Fine Arts history: Nghiem Lien Sang Phai of the Indochina Fine Arts School and Nhan Hoa Hau Kiem of the Resistance Fine Arts School. The two men's artistic contributions have been recognized both domestically and internationally at many levels from researchers, art lovers, collectors to the world's leading auction sales. Surely there will be people wondering why Luu Cong Nhan and Nguyen Tu Nghiem? Besides major works, these two artists are both very successful with gouache works on paper, a material that is not as highly appreciated as oil paint or lacquer, but perhaps the most sublime talents are honed and refined start here Gouache on paper. With only simple lines, sometimes without composition or shape, but with a strange style of writing, these paintings evoke the most subtle vibrations in the viewer, leaving behind many secret codes that the next generation will still have to continue decoding.