Workers are seen at the factory of Chang'an Automobile in Dingzhou, north China's Hebei Province, Sept. 28, 2017. Recent financial reports released by many markets indicate that the increase in R&D investment has boosted enterprises' performances. (Xinhua/Zhu Xudong)

Technicians test products at a test center of Midea's home appliances in Foshan, south China's Guangdong Province, April 11, 2017. Recent financial reports released by many markets indicate that the increase in R&D investment has boosted enterprises' performances. (Xinhua/Shen Hong)

Aerial photo taken on Nov. 30, 2018 shows a "charging tower" for electric vehicles at the headquarters of China's new energy vehicle maker BYD in Shenzhen, south China's Guangdong Province. Recent financial reports released by many markets indicate that the increase in R&D investment has boosted enterprises' performances. (Xinhua/Mao Siqian)

Photo taken on Nov. 30, 2018 shows a charging device and a new energy vehicle at the headquarters of China's new energy vehicle maker BYD in Shenzhen, south China's Guangdong Province. Recent financial reports released by many markets indicate that the increase in R&D investment has boosted enterprises' performances. (Xinhua/Mao Siqian)

A worker is seen at the factory of Chang'an Automobile in Dingzhou, north China's Hebei Province, Sept. 28, 2017. Recent financial reports released by many markets indicate that the increase in R&D investment has boosted enterprises' performances. (Xinhua/Zhu Xudong)

A representative of Huawei introduces the company's Ascend 310 chip at a release of the latest scientific and technological achievements in the global internet industry in Wuzhen, east China's Zhejiang Province, Nov. 7, 2018. Recent financial reports released by many markets indicate that the increase in R&D investment has boosted enterprises' performances. (Xinhua/Chen Yehua)

Aerial photo taken on Nov. 30, 2018 shows the "Yungui" driverless monorail transit system at the headquarters of China's new energy vehicle maker BYD in Shenzhen, south China's Guangdong Province. Recent financial reports released by many markets indicate that the increase in R&D investment has boosted enterprises' performances. (Xinhua/Mao Siqian)