President Xi Jinping visits the Chuanshan port area of the Ningbo-Zhoushan Port, one of the world's top container ports, on March 29, 2020. [Photo/Xinhua]

He instructed officials to remain alert to prevent importation of the virus or any domestic recurrence.

Special attention must be paid to asymptomatic infection, Xi said, adding that prevention and treatment measures must be continued in a strict, substantial and detailed manner.

Preventing importation of the virus should be the most important concern currently and for a relatively long period of disease prevention work, Xi said, adding that a solid defense without any gaps is needed.

He said the spread of the virus overseas has severely impacted international economic and trade activities, bringing new challenges to China's economy. It also has created the need for scientific development and industrial upgrading in China.

Xi instructed officials to analyze the situation and respond proactively to needs created by the current crisis.

The resumption of economic production should be accelerated in an orderly manner on the premise of intensifying disease prevention and control, and the problems of production resumption should be resolved, Xi said.

He instructed officials to take targeted measures to keep the international supply chain unblocked and ensure the normal operation of all kinds of international economic and trade activities.