what are bitcoins used for

9. Banks: Industrial and Commercial Bank, China Construction Bank and Agricultural Bank.7. Electricity: Changjiang Power, Huaneng Hydropower, China Nuclear Power, China Guangdong Nuclear Power and Guodian Power.8. Chips: SMIC, China Resources Micro, Cambrian, North Huachuang.

6. Traditional energy sources: China Petroleum, China Petrochemical, China CNOOC and China Shenhua.5. New energy sources: BYD, Contemporary Amperex Technology Co., Limited, Longji Green Energy and Goldwind Technology.6. Traditional energy sources: China Petroleum, China Petrochemical, China CNOOC and China Shenhua.

10. Non-bank finance: China Ping An, China Life Insurance, CITIC Securities, Bank of China, China Merchants Bank, Huatai Securities and Oriental Fortune.9. Banks: Industrial and Commercial Bank, China Construction Bank and Agricultural Bank.