A staff member shows a set of stamps released to commemorate the China International Import Expo (CIIE) at the National Exhibition and Convention Center in Shanghai, east China, Nov. 5, 2018. (Photos: Xinhua)

A journalist presents the first day cover with stamps released to commemorate the China International Import Expo (CIIE) at the National Exhibition and Convention Center in Shanghai, east China, Nov. 5, 2018.