Project 596L
596L (CHIC-3 by US intelligence) was the third nuclear weapon test conducted by the People's Republic of China. Detonated on May 9, 1966, at Lop Nur, it was the first Chinese test to use thermonuclear reactions in a layer cake design, and yielded 220 kilotons of TNT. As part of the Two Bombs, One Satellite project, it was conducted as a physics experiment to verify computational simulation for China's development of true (multi-stage) thermonuclear weapons.