Twenty thousand square meters. The bulletin board published by Lanzhou Wanda Mao shows that Lanzhou Wanda Mao is a one-stop service complex integrating shopping, leisure, entertainment experience and cultural tourism, with a total area of 320,000 square meters, including sports paradise, rainforest paradise and Hualian supermarket, in which Hualian supermarket covers an area of about 20,000 square meters and has complete products.