The National Library of France passes through a unique modern style bridge named Simon de Beauvoir Pedestrian Bridge. It is the 37th bridge in Paris. The main body of the bridge is a steel frame structure. The deck is covered with wooden panels. The two high and low steel frames link the banks of the Seine River. Most of the embankments of the Huangpu River in Shanghai are very high. In case of falling water, it is difficult to climb up. The two banks on both sides of the Seine River are high and low. The low bank is basically the same height as the water surface and far from the traffic flow. It is a good place for exercise and running. The bridge is pulled out from the high and low embankments, and the deck joins in the middle. Pedestrians can choose to go to the high or low banks on the other side.