How many billions of dollars did the Cloud Cave Library cost

Over 1 billion dollars. Cloud Cave Library is an iconic art building in Haikou Bay, Hainan Province, molded in one-piece by clear-water concrete, the library's construction cost exceeded the initial budget, the total cost will be more than 1 billion U.S. dollars, in which the library includes a reading space that can collect 10,000 books and multifunctional audio-visual area, as well as a cafe, mother and child room, public **** rest area, roof garden and other ancillary facilities, it is the public visitors to reading and leisure It is an ideal place for public visitors to read and rest.