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"By real autonomy, I mean at least cars at Level 4 or above," said Zhu.

"China is accelerating its opening up, which is a big cake that has great appeal for foreign firms," said Han Jian, a professor from the Business School of Nanjing University.

"By further improving its public transport system and intensifying its green urban infrastructure, Shenzhen might serve as a role model for its neighbors and other cities," he said.

"China has just begun the construction of national parks and has much to learn from its international counterparts, especially in the management of outdoor recreational activities," said Dong Erwei, a professor at the university. He is also director of the China International Center for Leisure and Tourism Research.

"COVID-19 control and prevention in Beijing will probably become a long-term effort," Xu said at a news conference on Sunday.