Professor Zhanyun Guo from School of Life Sciences and Technology, Tongji University, visited the Chinese National Compound Library (CNCL) in the afternoon of January 9, 2015. He was warmly greeted by Drs. Ming-Wei Wang (Director CNCL) and Xiao Luo (Assistance Professor), with whom plans of continued research collaboration on insulin-like peptide 5 was enthusiastically discussed.