SHANGHAI, April 22 (Xinhua) -- Shanghai will restart classes for senior students in middle and high schools on April 27. Those schools have been actively making full preparations for the reopening to ensure the safety of the students and teachers.

Middle and high school sophomores in Shanghai will return to school on May 6, while students in other grades and fourth and fifth-graders of elementary schools will return to school on May 18.

The time to resume classes for pupils of the first, second and third grades as well as kindergarten kids will be released in accordance with the epidemic situation.

[caption id="" align="alignnone" width="900"] A warehouse storing epidemic prevention and control materials at a middle school in east China's Shanghai.(Xinhua/Liu Ying)[/caption] [caption id="" align="alignnone" width="899"] A disinfection robot works at a classroom in a middle school in east China's Shanghai, April 21, 2020. (Xinhua/Liu Ying)[/caption] [caption id="" align="alignnone" width="900"] A teacher makes preparation at a temporary isolation room at a middle school in east China's Shanghai, April 21, 2020. (Xinhua/Liu Ying)[/caption] [caption id="" align="alignnone" width="900"] A warehouse storing epidemic prevention and control materials at a middle school in east China's Shanghai. (Xinhua/Liu Ying)■[/caption]