Dr. Su Metcalfe from Brain Repair Center, University of Cambridge (UK) and Dr. Mats Wikström from Copenhagen Protein Research Center (Denmark) visited the Chinese National Compound Library (CNCL) on October 16th and 17th, 2012, respectively. Professor Ming-Wei Wang briefly introduced the history and development plan of the library. Drs. Metcalfe and Wikström were impressed by this world class facility and its cultural environment, and hope to promote academic exchange and collaboration.