Xian, with 485 local symptomatic cases reported for the Dec. 9-25 period, has imposed heavy-handed measures to rein in the outbreak, in line with Beijing's policy that any flare-up should be contained as soon as possible. The city managed to quickly detect those cases through three rounds of mass testing, He Wenquan, a Xian official, told a press conference on Sunday, adding that high case numbers could persist into the next couple of days. "In order to quickly screen out the infected groups of people, after an analysis by experts, we will step up control measures in key areas, especially...