On May 28, when people were drinking tea and celebrating our traditional festivals, a "lifeline" defense battle of the city quietly broke out near the Jiuxi Water Plant by the Qiantang River in Hangzhou. After 15 hours of continuous efforts, the repair task of DN2400 outlet water pipe was successfully completed to ensure safe and high-quality water supply for the city. The water industry employees have interpreted the political and social responsibilities undertaken by the public utilities with practical actions.