A boy reads at Duoyun Bookstore in east China's Shanghai, Aug. 16, 2020. Located on the 52nd floor of the Shanghai Tower, Duoyun Bookstore has attracted a lot of people to read and enjoy a panoramic view of the city. (Photos: Xinhua)

People read at Duoyun Bookstore in east China's Shanghai, Aug. 16, 2020. Located on the 52nd floor of the Shanghai Tower, Duoyun Bookstore has attracted a lot of people to read and enjoy a panoramic view of the city.

People read at Duoyun Bookstore in east China's Shanghai, Aug. 16, 2020. Located on the 52nd floor of the Shanghai Tower, Duoyun Bookstore has attracted a lot of people to read and enjoy a panoramic view of the city.

People have a leisure time at Duoyun Bookstore in east China's Shanghai, Aug. 16, 2020. Located on the 52nd floor of the Shanghai Tower, Duoyun Bookstore has attracted a lot of people to read and enjoy a panoramic view of the city.

People read at Duoyun Bookstore in east China's Shanghai, Aug. 16, 2020. Located on the 52nd floor of the Shanghai Tower, Duoyun Bookstore has attracted a lot of people to read and enjoy a panoramic view of the city.

A woman reads at Duoyun Bookstore in east China's Shanghai, Aug. 16, 2020. Located on the 52nd floor of the Shanghai Tower, Duoyun Bookstore has attracted a lot of people to read and enjoy a panoramic view of the city.

People read at Duoyun Bookstore in east China's Shanghai, Aug. 16, 2020. Located on the 52nd floor of the Shanghai Tower, Duoyun Bookstore has attracted a lot of people to read and enjoy a panoramic view of the city.

People read at Duoyun Bookstore in east China's Shanghai, Aug. 16, 2020. Located on the 52nd floor of the Shanghai Tower, Duoyun Bookstore has attracted a lot of people to read and enjoy a panoramic view of the city.

People rest at Duoyun Bookstore in east China's Shanghai, Aug. 16, 2020. Located on the 52nd floor of the Shanghai Tower, Duoyun Bookstore has attracted a lot of people to read and enjoy a panoramic view of the city.