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"For some of my students, it was their first time to join in such a performance, but none of them complain about the laborious rehearsals in their spare time after school," Chen said.

"For example, in Shanghai, we invite professors to speak about the folk customs and history of the old city. It's not always about promoting books, but to add a cultural atmosphere to the bookstore. We are also building up a social circle for our readers with the same interests," Zhang said.

"Good coordination among hospitals and coordination between healthcare workers and management are essential to fighting the virus. Learning from the painful experience of SARS, when a large number of healthcare staff were infected, we did not admit several hundred patients in a single hospital, knowing that would ruin the hospital," he said.

"For the next step, speed is still not the priority that we want to pursue, and there is no target to say when and where we must go," said Huang Yiping, deputy dean of Peking University's National School of Development and the chairman of the CF40 academic board.

"For a socialist, you've got a lot more confidence in corporate America than I do," Biden said.