BEIJING — China has designated parts of Hebei province near Beijing as a coronavirus high danger zone after 14 new cases of COVID-19 were found.

Eleven of those cases were in Shijiazhuang city, where some events for the 2022 Winter Olympics will be held. An additional 30 people tested positive for the virus without showing any symptoms.

The other three COVID-19 cases were in the city of Yantai. Parts of Shijiazhuang were designated high danger areas, meaning they will undergo stricter testing and isolation measures, while parts of Yantai were registered as medium risk areas.

China has recorded 87,183 cases of COVID-19, with 4,634 deaths. People who have tested positive but not shown symptoms have been counted separately.

China is urging tens of millions of migrant workers to stay put during next month’s Lunar New Year holiday, usually the world’s largest annual human migration. Classes are also being dismissed a week earlier than usual and tourists are being told not to come to Beijing for holidays.