Prof. Zheng Zheng was invited as the special visitor to attend the World Multidisciplinary Earth Science Symposium 2016, held in Prague, Czech Republic on September 5th – 9th , 2016. The main mission of the "World Multidisciplinary Earth Sciences Symposium - WMESS" is to lead to contribution in multidisciplinary studies related with atmosphere, biosphere, hydrosphere, lithosphere and pedosphere of the Earth and interaction of humans with them.
During the ceremony of the symposium, Prof. Zheng delivered the theme lecture titled Challenges of Chinese river water security. During the lecture, Prof. Zheng pointed out the challenge of non-point source water pollution in China and gave some concrete and feasible suggestions for the non-point source pollution control. The lecture received the warm attention by the attendees in the symposium. Xin Cao, the Ph. D. candidate advised by Prof. Zheng, also gave an oral report in a sub-venue of the WMESS 2016.