Photo taken on Nov. 7, 2018 shows a RS 6 of Audi at the first China International Import Expo (CIIE) in Shanghai, east China. (Photos: Xinhua)

Photo taken on Nov. 7, 2018 shows a Honda Clarity Fuel Cell vehicle at the booth of Honda during the first China International Import Expo (CIIE) in Shanghai, east China.

Photo taken on Nov. 7, 2018 shows a e-tron SUV at the booth of Audi during the first China International Import Expo (CIIE) in Shanghai, east China.

Photo taken on Nov. 7, 2018 shows Mirai hydrogen fuel cell vehicle of Toyota at the first China International Import Expo (CIIE) in Shanghai, east China.

Photo taken on Nov. 7, 2018 shows a "flying car" developed by AeroMobil at the first China International Import Expo (CIIE) in Shanghai, east China.

Photo taken on Nov. 7, 2018 shows a "flying car" developed by AeroMobil at the first China International Import Expo (CIIE) in Shanghai, east China.

Photo taken on Nov. 7, 2018 shows a "flying car" developed by AeroMobil at the first China International Import Expo (CIIE) in Shanghai, east China.

Photo taken on Nov. 7, 2018 shows a Lincoln Aviator at the first China International Import Expo (CIIE) in Shanghai, east China.

Photo taken on Nov. 7, 2018 shows a 911 GT3 RS of Porsche at the first China International Import Expo (CIIE) in Shanghai, east China.

Photo taken on Nov. 7, 2018 shows a L4 autonomous driving test car of BMW 7 Series at the first China International Import Expo (CIIE) in Shanghai, east China.