Models show how to use electric cigarettes at a booth at the 2019 IECIE Shenzhen eCig Expo at the Shenzhen Convention and Exhibition Center on Monday. More than 1,500 brands from 45 countries joined the fair, a record since it was first held in 2015. The show, covering an area of 40,000 square meters, attracted roughly 50,000 professional buyers. The three-day fair closed yesterday.Sun Yuchen