William visited the group on Jan 3-5. William met us at a workshop organized by Lancaster University, in Accra, Ghana in last March. He then decided to pursue his PhD degree in our group. William has been a technical officer in the Water Research Institute (WRI) of Commonwealth Science and Industry Research (CSIR) of Ghana (加纳). He was successfully enrolled in China Geosciences University at Wuhan, with the help from Professor Qi Shihua（祁士华）. He will spend his first year in Wuhan for classes, then join us in Guangzhou for research. On this visit, he gave a talk introducing himself on group meeting on Jan 4th. In the meantime, we had time to gather at night of the 3rd for a beer on the waterfront of the Pearl River, and the 4th at Hutaoli (胡桃里）pub. Willaim will go back to Ghana for sampling in the coming winter holiday.