Since establishment in 1955, Guang'anmen Hospital has undertaken more than 900 scientific research projects at or above the institute level, including more than 350 national projects ( 256 projects of National Natural Science Foundation of China). At present, our hospital has 270 projects above the institute level, including 95 national level projects (including 82 National Natural Science Foundation projects), 50 ministry level projects, 52 Beijing municipal level projects, and 73 projects of China Academy of Chinese Medical Sciences.