Geng Meiyu (C), key inventor of the drug GV-971, also a researcher of Shanghai Institute of Materia Medica under Chinese Academy of Sciences, discusses the research progress with her team at the Green Valley institute 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)