A medical worker poses with stamps issued to mark China’s battle against coronavirus in Wuhan, Central China’s Hubei province on May 11, 2020. A total of 66 medical workers from six local hospitals attend issuing event of the themed stamps on Monday. (Photo: China News Service/ Zhang Chang)

Medical workers attend an issuing event of stamps themed with coronavirus battle in Wuhan, Central China’s Hubei province on May 11, 2020. A total of 66 medical workers from six local hospitals attend issuing event of the themed stamps on Monday. (Photo: China News Service/ Zhang Chang)

Medical workers attend an issuing event of stamps themed with coronavirus battle in Wuhan, Central China’s Hubei province on May 11, 2020. A total of 66 medical workers from six local hospitals attend issuing event of the themed stamps on Monday. (Photo: China News Service/ Zhang Chang)

Medical workers attend an issuing event of stamps themed with coronavirus battle in Wuhan, Central China’s Hubei province on May 11, 2020. A total of 66 medical workers from six local hospitals attend issuing event of the themed stamps on Monday. (Photo: China News Service/ Zhang Chang)