At 239 meters high on the 52nd floor of the Shanghai Tower, Duoyun Bookstore opened on Monday, making it the city's highest bookstore. The bookstore occupies more than 2,200 square meters and has 16,000 varieties of books on sale. Arched bookshelves and spacious space allow visitors to enjoy a wonderful, panoramic view of the city. The bookstore has become a popular site and tourists have to line up for three hours to get in.