Xu Delong, a doctor of orthopedics department in Wuhan No.4 Hospital, infected with the COVID-19 when he received a patient in January. It is the second time that he donated plasma for other patients after he was cured. When talked about the treatment of COVID-19, Xu mentioned that after the outbreak of the virus, receiving treatment in hospitals became very difficult. So he decided to stay at home and provide his professional knowledge to fight with the virus. Doctor Xu said that if he hadn’t been infected with the virus, he must be fighting at the front line with his colleagues now. "Seeing my colleagues fighting so hard at the front line, I feel so worried and always want to do something for them. And now the only thing I can do to help is to donate plasma regularly. " (Photos: Cui Meng/GT)