BIT Mining is a cryptocurrency mining enterprise that acquires cryptocurrency mining machines to mine for both Bitcoin and Ethereum. The company was originally an online sports lottery service provider that aggregates and processes lottery purchase orders. It derives nearly all of its revenue from service fees paid by local sports lottery administration centers for the purchase orders of sports lottery products directed to such centers. BIT Mining Limited was founded in October 2001 in Shenzhen as 500wan.com Ltd., with a registered capital of RMB 50 million. The company secured venture capital investments of several million U.S. dollars from IDG Capital Partners, Sequoia Capital, and SIG Capital in September 2007. It changed its name to 500.com in October 2013 and went public on the New York Stock Exchange (NYSE) under the symbol WBAI on November 22, 2013.