China’s local symptomatic coronavirus cases crept up again, with most new infections reported in the northwestern city of Xian as it entered a fifth day of a lockdown. Xian’s case load – 150 local symptomatic cases on Sunday versus 155 a day earlier – remains tiny compared with many clusters overseas, but it has imposed tough curbs on travel inside and out of town, underpinning Beijing’s drive to contain flare-ups as soon as possible. The latest outbreak has led to 635 local confirmed cases in Xian, a city of 13 million people, during the Dec. 9-26 period, with no Omicron variant infections yet reported.