Can Tianjin Education Bureau go to school on sunny days?

You can't. Students with symptoms of COVID-19 virus infection need to undergo antigen test, while other students without symptoms still go to school at normal speed. Students who are diagnosed as positive study at home, and other students can continue their classes. Tianjin, also known as Jingu and Jinmen, is a provincial-level administrative region, municipality directly under the Central Government, national central city and megacity of People's Republic of China (PRC), and is the economic center of the Bohai Rim region determined by the State Council.