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As Chinese researchers and doctors deepened their understanding of the coronavirus, the NHC updated different versions of guidelines on diagnosis and treatment of the COVID-19 and shared them globally.

"They are using big data, artificial intelligence (AI) in places," Aylward said, adding that China has managed massive amounts of data in finding each COVID-19 cases and tracing contacts, as well as been able to make consultation of regular health services done online, by which the capacity of hospitals could be intensively used for COVID-19 cases.

Sun made the remarks while being connected via video with representatives of female medical workers, police, disease control staff, community workers, journalists and volunteers.

During the difficult time of China's fighting against the COVID-19 epidemic, Senegal and many other African countries maintained trust in China and didn't evacuate their students, Wang said, adding that China has also kept its promise to protect the safety of African nationals in China, especially students, just like family members.

Masks, gloves and in some cases protective suits, are available for the volunteers, said Zhou Lin, a community official.