On August 8-10, a group of us including Liu Xin, Zhang Ruiling, Zhang Gan, Chen Wenwen, Mahdi and Dilanka attended the 11th International Symposium on Environmental Geochemistry (ISEG) in Peking Universe. The symposium was organized by Professors Tao Shu（陶澍） and Zhu Dongqiang（朱东强）.  Gan was invited to give a keynote speech entitled ‘Development and Applications of Radiocarbon Analysis Techniques for Tracking Atmospheric Organic Species in China’. The talk promoted our works on radiocarbon analysis of BC/BrC/Di-acids/IVOC (naphthalene), and demonstrated radiocarbon analysis as a powerful tool in tracing the sources of atmospheric organics.   Other group members all gave poster presentations, a bunch of ‘waters’! On the eve of the opening ceremony day, we are able to gather in a restaurant  ‘Friday’  for a drink.