Because of epidemic prevention and control measures. Zhejiang province, referred to as "Zhejiang", is the capital of Hangzhou. Qiantang River, the largest river in Zhejiang Province. Because of the requirements of epidemic prevention and control measures, Zhejiang Library has adopted measures such as limiting the flow, making an appointment to enter the library, and "one out and one in", and the opening hours of some libraries and some offline activities will be adjusted.