CHANGCHUN — The northeastern Chinese cities of Changchun and Jilin, hardest hit by the fresh outbreak of COVID-19, have distributed millions of COVID-19 self-test antigen kits to citizens, including students, to accelerate massive epidemiological screening. Starting from 4 am Wednesday, Changchun, the capital of Jilin province, has given out more than 3.34 million self-test kits to part of its urban …