BEIJING, June 5 (Xinhua) -- Chinese health authority said Friday that no new domestically transmitted COVID-19 cases were reported on the mainland Thursday. Five imported cases, including four in Shanghai and one in Sichuan Province, were reported on the mainland, the National Health Commission said in its daily report. No deaths related to the disease or new suspected cases were reported, according to the commission. On Thursday, eight people were discharged from hospital after recovery, while the number of severe cases declined by one to only one. As of Thursday, the overall confirmed cases on the mainland had reached 83,027, including 66 patients who were still being treated, and 78,327 people who had been discharged after recovery. Altogether 4,634 people had died of the disease, the commission said. By Thursday, the mainland had reported a total of 1,768 imported cases. Of the cases, 1,707 had been discharged from hospitals after recovery, and 61 remained hospitalized, with no one in severe conditions. No deaths from the imported cases had been reported. [caption id="attachment_49394" align="alignnone" width="544"] A teacher measures a student's body temperature at a primary school in east China's Shanghai, June 2, 2020. More students in Shanghai returned to school as public kindergartens and the first to third grades of primary schools reopened. (Xinhua/Zhang Jiansong)[/caption] The commission said there were two imported suspected cases on Thursday. According to the commission, 4,117 close contacts were still under medical observation after 508 people were discharged from medical observation Thursday. Also on Thursday, three new asymptomatic cases were reported on the mainland. One imported case was re-categorized as confirmed case, and 31 asymptomatic cases were discharged from medical observation. The commission said 297 asymptomatic cases, including 41 from overseas, were still under medical observation. By Thursday, 1,099 confirmed cases including four deaths had been reported in the Hong Kong Special Administrative Region (SAR), 45 confirmed cases in the Macao SAR, and 443 in Taiwan including seven deaths. A total of 1,042 patients in Hong Kong, 45 in Macao, and 428 in Taiwan had been discharged from hospitals after recovery.