Covid-hit Xi'an tightens measures as China sees 21-month case record

The Chinese city of Xi'an, where 13 million residents are currently confined to their homes, announced tightened restrictions on Sunday as the country recorded its biggest COVID-19 infection numbers in 21 months.

source https://medicalxpress.com/news/2021-12-covid-hit-xian-tightens-china-month.html