Professor Paul van den Brink from Wageningen University visited SERI on January 9-12, 2017. During the visit, Professor van den Brink discussed with Pofessor Guang-Guo Ying the progress of two joint PhD students Ms Fengjiao Peng and Mr Naisheng Zhang. Paul is a professor of Chemical Stress Ecology at Wageningen University, and he was the past president of SETAC World and SETAC Europe.