A specially made bullet train grabs people's attention at the 2018 China (Hunan) International Rail Transit Expo (Expo) held in Changsha city, Hunan province from Nov 15 to 17. Different from normal trains, this model has a two-layer structure similar to a double-decker bus. The double-decker bullet train can carry 30 to 40 percent more passengers while still featuring high speed, safety and reliability. [Photo provided to chinadaily.com.cn]