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- Not to be confused with 21, Inc.
21bitcoin mining pool is a Hong Kong based mining pool (web front located in US).
Opened in June 20, 2011, 21bitcoin mining pool is grown up to the most vigorous mining pool in Chinese Netsphere. The pool operator also sells mining contracts.
- 21bitcoin 礦場 是一個香港的礦場（網站前端設置在美國）