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Chen Yubo, head of Tsinghua University's CIDG, said that many countries have made the digital economy a bedrock for their economic development. The acceleration of digital transformation is irreversible for the world's economic and social development, especially as the COVID-19 pandemic has continued to evolve and rebound in some parts of the world.

Chen Peiliang, president of the company, said the environmental sanitation industry had entered the AI-era. The company's self-driving vehicles are intelligent robots with auto piloting systems. They can replace humans as street cleaners.

Chen Yingqun in Beijing and agencies contributed to this story.

Cheng Hongxian, a Guangzhou office worker, said the regulation has great significance in Guangdong province, which has the country's largest number of female migrant workers from around the country.

Chen is just one of a growing number of digital-savvy elderly consumers making up the Chinese "silver economy" that businesses with the latest technologies are targeting.