Xunhu Cup, the 4th National Exhibition Teacher Micro-class Competition, etc. From June 2/KLOC-0 to June 24, 20021China Convention and Exhibition Economy Research Association Annual Meeting and China Convention and Exhibition Economy (Tianjin) Forum was held in the National Convention and Exhibition Center (Tianjin). At the same time, the 4th National Exhibition Teachers Micro-class Competition of Xunhu Cup and the 5th National Exhibition College Students Innovation and Creativity Challenge of Xunhu Cup were held.