The opening hours of canteen food in Guangzhou in April 2122 are April 21th and 21th. According to the relevant public information, the catering establishments in Guangzhou's closed control area, control area and prevention area will resume business and dining on their own after being unsealed (from 12: 11 on April 21), and social catering service units in other areas (including beverage shops, snack bars and breakfast shops, etc.) will resume dining on April 21.