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"Even if you're not following Chinese innovation closely, Chinese innovators may come and knock on your door anywhere you are in the world and indeed lift the level of competition," Vijay Vaitheeswaran, an award-winning senior correspondent for The Economist, said at the event.

"Eliminating new infections in Wuhan is my best birthday gift," said Zhang after working around-the-clock to treat patients for over a month.

"Fetching water used to be a big headache. We had to travel to a faraway river to get water and even cut holes in the ice in winter. Then the small train sent water right to our doorsteps," said Li Zuopei, an 80-yearold resident of Yingbishan village.

"Every time I come here, there's something new to participate in and to learn about," said Amy Paulose, general manager of US nuts brand Emily's. "The Tmall team has been so great and supporting us ... (to identify) the right activities for each brand."

"Different cities will have different standards based on their conditions. Those who fail to meet their air quality improvement targets will be held accountable," Liu added. "In the coming months, we will make every effort to implement all tasks, vigorously reduce the emissions of major air pollutants and ensure the completion of the goal to improve air quality in autumn and winter."