BEIJING — Here are the latest developments on the novel coronavirus disease (COVID-19) in China:

— Central China's Hunan province, neighboring the former coronavirus epicenter of Hubei province, further downgraded its emergency response toward the COVID-19 outbreak from the second level to the third level on March 31. 

— A total of 7,022 medical workers belonging to 66 medical assistance teams left Hubei by air on March 31 as the COVID-19 outbreak in the hard-hit province has been subdued.

— China's national college entrance exam, also known as Gaokao, will be postponed by a month to July 7 and 8 due to the novel coronavirus disease epidemic.

— Students shall always wear protective masks in the classroom as schools start to reopen, an official with the Ministry of Education said on March 31. 

The official said the timetable for beginning the new semester and resuming classes in universities should be based on the local epidemic situation and the composition of students.

— The first batch of volunteers for a coronavirus epidemiological survey began to work on March 31 in Shanghai after completing professional training.

— China's highest-altitude mask factory has been put into operation on March 30 in Southwest China's Tibet autonomous region.

— Over 300 metric tons of supplies for combating the novel coronavirus pandemic will be sent from Xi'an, capital of northwestern China's Shaanxi province, to Europe.

— No new domestically transmitted cases of COVID-19 were reported on the Chinese mainland on March 30. 

The National Health Commission received reports of 48 new confirmed COVID-19 cases on the Chinese mainland on March 30, all of which were imported.

Also on March 30, one death in Hubei province, and 44 new suspected cases were reported on the mainland.

— As of March 31, a total of 81,518 confirmed cases had been reported on the mainland, and 3,305 people had died of the disease.

A total of 282 patients were discharged from the hospital on March 30 on the Chinese mainland. Altogether 76,052 patients had been discharged from the hospital after recovery by the end of March 30.

— By the end of March 30, 771 imported cases had been reported.

— No new confirmed cases were reported on March 30 in Wuhan, the hardest-hit city in Central China's Hubei, which also registered no increase in new COVID-19 cases.

Hubei has so far reported a total of 67,801 confirmed COVID-19 cases, including 50,006 in Wuhan.