Prof. Leyong Wang was pleased to participate'The First C3 Symposium on Supramolecular Chemistry', from 16-18th , April 2017. at Xiamen Univ. and to deliver an invited lecture. XMU has a very beautiful campus and we really enjoy the fresh air here. Many thanks to our great host of Prof. Yunbao Jiang（江雲寶）, Professor Xiaoyu Cao（曹曉宇）, and Dr. Qian Wang （王茜）of Xiamen Univ..