Workers package protective suits at the workshop of Foshan Nanhai Plus Medical Co., Ltd. in Foshan, south China's Guangdong province, March 3, 2020. (PHOTO / XINHUA)

A pharmacy staff member dispenses medicines at the chain store of Hankou pharmacy in Huangshi Road of Wuhan, central China's Hubei province, Feb 27, 2020. (PHOTO / XINHUA)

Medical team members of the Second Hospital of Shandong University swear an oath before leaving for Hubei province, in Jinan, capital of east China's Shandong province, Feb 9, 2020. (PHOTO / XINHUA)

Railway workers carry supplies to be transported to Hubei province at the international railway port in Nanning, south China's Guangxi Zhuang Autonomous Region, March 3, 2020. (PHOTO / XINHUA)

Dancers of a local ballet troupe demonstrate movements during an open course on live stream, in east China's Shanghai, Feb 29, 2020. Due to the novel coronavirus outbreak, the art group has canceled its on-site open course and moved it online. (PHOTO / XINHUA)

Community workers learn about residents' situation in Caidian District of Wuhan, central China's Hubei province, Feb 7, 2020. (PHOTO / XINHUA)

Photo taken on Jan 22, 2020 shows Zhou Qiong, a doctor of department of respiratory medicine at Union Hospital affiliated to Tongji Medical College of Huazhong University of Science and Technology, who is a member of "assault team" in the fight against the pneumonia caused by the novel coronavirus in Wuhan, central China's Hubei province. (PHOTO / XINHUA)

A worker makes protective suits at the workshop of Foshan Nanhai Plus Medical Co., Ltd. in Foshan, south China's Guangdong province, March 3, 2020. (PHOTO / XINHUA)

Teacher Chen Weiwen interacts with her students during a trial online class in Shanghai, east China, Feb 25, 2020. (PHOTO / XINHUA)

Huang Fei disinfects the bus before starting a day's work in Zhengzhou, central China's Henan province, Feb 24, 2020. Huang Fei, a bus driver born in 1986, conducts a variety of measures to safely facilitate the travel of people during the epidemic control period. (PHOTO / XINHUA)

Zhang Huibian, a staff member of the Center for Disease Control and Prevention of Lyuliang, puts on protective suit outside a laboratory in Lyuliang, north China's Shanxi province, March 3, 2020. (PHOTO / XINHUA)

Combo photo shows worker Li Xinyuan working at the construction site (above) taken on March 6, 2020 by Zhou Hua and posing for a photo at a photography studio taken on March 5, 2020, in Nanning, south China's Guangxi Zhuang Autonomous Region. As the International Women's Day is drawing near, the Guangxi branch of China Construction Third Bureau First Engineering Co., Ltd. took photos for their female workers as a special gift to record their beautiful moments amid the outbreak of the novel coronavirus disease (COVID-19). (PHOTO / XINHUA)

Combo photo shows worker Ji Fangzhen working at the construction site (above) taken on March 6, 2020 by Cao Yiming and posing for a photo at a photography studio taken on March 5, 2020, in Nanning, south China's Guangxi Zhuang Autonomous Region. (PHOTO / XINHUA)

Combo photo shows worker Zhou Shulan working at the construction site (above) taken on March 6, 2020 and posing for a photo at a photography studio taken on March 5, 2020, in Nanning, south China's Guangxi Zhuang Autonomous Region. (PHOTO / XINHUA)

Female medical worker Chen Guoyan from Shijiazhuang poses like a superman at a makeshift hospital in Wuhan, central China's Hubei province, Feb 28, 2020. (PHOTO / XINHUA)

Female medical worker Mo Shijiao from Shijiazhuang cheers for herself at a makeshift hospital in Wuhan, central China's Hubei province, March 5, 2020. (PHOTO / XINHUA)

Female medical worker Chen Guoyan from Shijiazhuang cheers for herself at a makeshift hospital in Wuhan, central China's Hubei province, March 5, 2020. (PHOTO / XINHUA)

Medical team members take an oath before leaving for Hubei province at West China Hospital of Sichuan University in Chengdu, capital of southwest China's Sichuan province, Feb 7, 2020. (PHOTO / XINHUA)

Nurse Zhou Li wears a protective suit before entering a ward at Xianghu Hospital of the First Affiliated Hospital of Nanchang University in Nanchang, east China's Jiangxi province, Feb 5, 2020. (PHOTO / XINHUA)

Li Lanjuan, an academician with the Chinese Academy of Engineering, who heads the State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, receives an interview with Xinhua in Hangzhou, capital of east China's Zhejiang province, Jan 29, 2020. (PHOTO / XINHUA)

A staff checks the nucleic acid test kit at the plant of Luoyang Ascend Biotechnology Co., Ltd in Luoyang, central China's Henan province, March 4, 2020. (PHOTO / XINHUA)

Volunteer Li Wenqi stands in the snow at a checking point for epidemic prevention in Harbin, northeast China's Heilongjiang province, Feb 29, 2020. (PHOTO / XINHUA)

Workers are busy on the production line of Cefaleolin sodium for injection in the Harbin Pharmaceutical Group General Pharmaceutical Factory in Harbin, northeast China's Heilongjiang province, March 2, 2020. (PHOTO / XINHUA)

Doctor Hu Xiaoling (right) with her colleague delivers medicines to a household in Nanchang, east China's Jiangxi province, Feb 26, 2020. (PHOTO / XINHUA)