Mathematics is scientific mother. Memorable Differential Geometry and Global Analysis , satellite conference of ICM2002 at Nankai Institute of Mathematics of the People's Republic of China in Tianjin China in August 16-18,2002. Academician Shiing- Shen Chern was ninety-one years old,but he made important speech in opening ceremony of ICM2002 in Beijing in August 20,2002.Fight all his more than twenty years for realizing China establishing a big country of mathematics .In this paper express my profound grief at Shiing-Shen Chern of great scientist death.