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Amid the prevention and control of novel coronavirus pneumonia, such machinery - including drones, self-propelled agricultural machines and automatic driving tractors - is being widely adopted, along with information technology.

Amid the events, sporadic confrontations were also seen. The participants had to raise their voices and defend their position when masked and black-clad protesters showed up and attempted to interrupt. But no serious clashes happened.

Among the four competitiveness factors in the yearbook, China ranked second in "economic performance." China also topped the three sub-indices of "domestic economy", "employment" and "labor market."

Among the top 500 private enterprises, 321 companies have their research and development personnel accounting for over 3 percent of their total employees.

Among them, about 4 million were directly involved; 3 million skiers and 1 million skaters, said Tang. The total number will reach 17 million in this snow season.