Not Shanghai, referred to as "Shanghai" or "Shen" for short, it is the largest economic center and an important international financial center city in China, and the first batch of coastal open cities. Shanghai is located in the east of China, where the local library is located. The reserved seats are not made casually. The East Library of Shanghai Library has a total construction area of 1 1.5 million square meters, with 7 floors above ground and 2 floors underground, which is the largest single building in China at present. In the reading square on the third floor, readers can reserve seats in advance.