Chinese authorities continue to underreport COVID-19 cases in the mainland, according to recent government documents obtained by The Epoch Times from a trusted source. Evidence suggests that there may be many reinfection cases that the Chinese regime has concealed as they shift the responsibility to local authorities. Since the beginning of the year, a few reinfection cases have been reported by local authorities and the media in various places in the mainland. On May 1, Henan provincial authorities reported one patient who recovered from COVID-19 but tested positive after being discharged from the hospital on April 3, according to Chinese news portal Sina. A similar case was reported in Shanxi Province on April 27—a COVID patient was reinfected after being hospitalized, according to Chinese media reports. On April 24, authorities in Wangkui county of Heilongjiang Province reported one reinfection case. But on the same day, The Epoch Times learned from an …