A patient strikes elbow with a medical staff instead of shaking hands at Tangdu Hospital of Xi'an Air Force Military Medical University in Xi'an, northwest China's Shaanxi Province, Feb. 4, 2020. The first patient recovering from novel coronavirus infection in Shaanxi Province was discharged from hospital on Tuesday. (Xinhua/Liu Xiao)

A patient expresses gratitude to medical staff at Tangdu Hospital of Xi'an Air Force Military Medical University in Xi'an, northwest China's Shaanxi Province, Feb. 4, 2020. The first patient recovering from novel coronavirus infection in Shaanxi Province was discharged from hospital on Tuesday. (Xinhua/Liu Xiao)

The cured patients wave goodbye to medical staff in the First Affiliated Hospital of Zhengzhou University in Zhengzhou, central China's Henan Province, Feb. 4, 2020. Five pneumonia patients infected with the novel coronavirus were cured and discharged from the hospital on Tuesday. (Xinhua/Li An)

The cured patients (2nd R to 3rd L) pose for photo with medical staff in the First Affiliated Hospital of Zhengzhou University in Zhengzhou, central China's Henan Province, Feb. 4, 2020. Five pneumonia patients infected with the novel coronavirus were cured and discharged from the hospital on Tuesday. (Xinhua/Li An)