In the afternoon of May 5, 2017, Dr. Yang Du, Research Scientist from Department of Molecular and Cellular Physiology, School of Medicine, Stanford University (USA) visited the Chinese National Compound Library (CNCL). This was his second visit since 2015. Dr. Du was warmly received by Drs. Kaixian Chen (Academician of Chinese Academy of Sciences, CAS), Ming-Wei Wang (Director, the National Center for Drug Screening/Chinese National Compound Library) and Dehua Yang (Associate Professor of Shanghai Institute of Materia Medica, CAS). During the visit, Dr. Du also interacted with Dr. Di Zhu (Associate Professor, School of Pharmacy, Fudan University).