A purchaser watches measuring and testing machines during the China Guangzhou International Automotive Technology Expo 2021 in Guangzhou, south China's Guangdong Province, May 25, 2021. The expo opened here on Tuesday. (Photos: Xinhua)

Purchasers watch automotive electronic products during the China Guangzhou International Automotive Technology Expo 2021 in Guangzhou, south China's Guangdong Province, May 25, 2021. The expo opened here on Tuesday.

A purchaser takes photos of an automotive display screen during the China Guangzhou International Automotive Technology Expo 2021 in Guangzhou, south China's Guangdong Province, May 25, 2021. The expo opened here on Tuesday.

A purchaser consults on the automotive electronic products during the China Guangzhou International Automotive Technology Expo 2021 in Guangzhou, south China's Guangdong Province, May 25, 2021. The expo opened here on Tuesday.

Purchasers watch a super-high resolution display screen for cars during the China Guangzhou International Automotive Technology Expo 2021 in Guangzhou, south China's Guangdong Province, May 25, 2021. The expo opened here on Tuesday.

Purchasers watch an automotive charging robot working during the China Guangzhou International Automotive Technology Expo 2021 in Guangzhou, south China's Guangdong Province, May 25, 2021. The expo opened here on Tuesday.

A purchaser watches a testing machine during the China Guangzhou International Automotive Technology Expo 2021 in Guangzhou, south China's Guangdong Province, May 25, 2021. The expo opened here on Tuesday.