According to the latest notice of local Yan 'an epidemic policy, further optimize the school epidemic prevention and control work. Schools without epidemics should carry out normal offline teaching activities, and schools with epidemics should accurately define risk areas.

Yan 'an generally refers to Yan 'an City. Yan 'an, referred to as "Yan" for short, is a prefecture-level city and sub-central city under the jurisdiction of Shaanxi Province. It is located in the north of Shaanxi Province, in the middle reaches of the Yellow River, in the south-central part of the Loess Plateau, 37 1 km north of the provincial capital xi 'an.