Prof. Wolfgang Gärtner visited the Huazhong Agricultural University in Wuhan, China as a „Visiting Professor“ for the fourth time. He presented a lecture course on Photobiology from April 14th to 25th that is an official part of the curriculum and visited by many interested students. Together with his collaborator Prof. Zhao, Kai-hong from the State-Key-laboratory of the university, Prof. Gärtner cultivates the german-chinese relationship with much success and enthusiasm.