To foster international coopoeration in realizing smart city development, The China Center for Urban Development under the National Development and Reform Commission and Smart City Development Alliance jointly organized the Third China Smart City (International) Expo on 22-24 September 2017 in Shenyan, China. As supporter of the event, Certizen delegates travelled to Shenyang to discuss the leading smart city technologies with representatives from different sectors. Focus of the expo is on the revitalization of the North-East China, the development of smart city and big data.