More stringent regulations have led many large bitcoin companies in China to flee the market.
Bitman, which operates two of China's largest bitcoins, has relocated its headquarters to Singapore, and has stepped up its virtual digging operations in the United States and Canada.
BTC.Top, China's third-largest virtual cash cow company, also launched its new facility in Canada, while ViaBTC, the fourth largest company, has moved its operations to Iceland and the United States.