North China’s Tianjin with population of 14 millions, a municipality 100km to the southeast of Beijing, has started a citywide nucleic acid testing after 20 people tested positive for COVID-19. 擁有 1400 萬人口的華北天津市位於北京東南部 100 公里處，在 20 人的 COVID-19 檢測呈陽性後，已開始全市核酸檢測.
Johnson Choi Biz 
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