More Omicron cases were reported in China on Monday, jangling nerves in a country that is set to host the Olympics in a matter of weeks. The number of cases in the city of Tianjin, which borders Beijing, doubled from 20 to 40, while two new cases were reported in central China, according to state media. The two cases in Anyang, in the central province of Henan, were linked back to the Tianjin outbreak via two students who returned to the area from Tianjin at the end of December. Not only is the outbreak coming in a country that has prided itself with keeping the virus under control thanks to s…