Geng Meiyu (2nd L), key inventor of the drug GV-971, also a researcher of Shanghai Institute of Materia Medica under Chinese Academy of Sciences, speaks about the invention of the new drug during a press conference in Shanghai, east China, Nov. 3, 2019. A home-grown drug for treating Alzheimer's disease has been approved by the National Medical Products Administration to hit the market, according to its developers Saturday. The drug, GV-971, was developed by Ocean University of China, Shanghai Institute of Materia Medica under Chinese Academy of Sciences and Green Valley Pharmaceutical Co., Ltd, after research efforts of 22 years. (Xinhua/Jin Liwang)