Look at the logistics requirements to test 12 & 14 millions people in 2 cities in China with digital tracing.

Look at the logistics requirements to test 12 & 14 millions people in 2 cities in China with digital tracing. 看看物流要求，用數字追踪測試中國 2 個城市的 1200和 1400 萬人.

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. https://johnsonwkchoi.business.blog/2022/01/09/tianjin-with-14-millions-citywide-nucleic-acid-testing-after-20-people-tested-positive-for-covid-19/

Central China’s Zhengzhou scrambles to test 12.6 million residents for COVID19 in 6 hours. by Global Times Jan 07 2022 中國中部的鄭州爭先恐後地在 6 小時內對 1260 萬居民進行 COVID19 檢測。 環球時報 https://johnsonwkchoi.business.blog/2022/01/09/central-chinas-zhengzhou-scrambles-to-test-12-6-million-residents-for-covid19-in-6-hours/