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An Airbus A350 aircraft on display at the Airbus aircraft manufacturer in Blagnac near Toulouse, France on March 20, 2019. [Photo/IC]
Among top 500 firms, the key technologies of 402 companies were mainly developed independently, accounting for 80.4 percent of the total. The number of valid patents obtained by the top 500 firms increased by 8.46 percent in 2019, while the figure for international patents also grew significantly.
An Amazon Web Services employee claims the company had never heard of?CafeX Communications and its competing Chime service when it decided to christen its new set of conferencing and collaboration tools Amazon Chime.
An obvious line emerges at the confluence of Yellow River and Bohai Sea. Photos were taken by a staff member of the border defense forces' unit in Dongying. [Photo/chinadaily.com.cn]
Among those, 10 companies, such as Ant Financial Services, Didi Chuxing and Xiaomi, have valuations over billion and have become super unicorn enterprises.
来源：资阳报