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Editors note: This was contributed byLinda Lew, a freelance writer based in Beijing, currently studying for her Masters in Global Business Journalism at Tsinghua University. Before moving to China, she worked in New Zealand in cross-cultural communications focusing on the Asia Pacific region. She is interested in start-ups, technology, economics and the arts.

Bitcoin has proliferated in China so much that 70% of the worlds bitcoin computational power is concentrated here. Many bitcoin mining operations have even sprung up in power stations deep in rural Sichuan hillsides, an unexpected place to be associated with a blockchain-based digital currency.

As Bitcoin Mining explains, mining is a way to reward those who contribute computational power to the Bitcoin network by converting electricity. Miners are rewarded by bitcoins or the transaction fees included in the transactions validated when mining bitcoins. It can be easy to start mining for bitcoins: the required computer hardware and software are readily available. What is hard to do, however, is to mine bitcoins profitably.

Locations with cheap power will have a definite advantage. At Sichuans Leshan city, where many large scalebitcoin mines are based, the rate for commercial use electricity during the wet season is around RMB 0.5 per kilowatt. This is less than half of the rate in metropolitan centers, such as Beijing where commercial power costs around RMB 1.28 per kilowatt.

Sichuans is rich in hydroelectric resources, Ke Lei, a bitcoin mining supervisor explained in an interview (in Chinese). When in season, the hydropower stations generate more than whats needed and the electricity actually ends up being wasted. Why dont we make the most of this and turn the wasted power into Bitcoins?

Estimates say that there are over 10 thousand bitcoin mining machines hooked up to Sichuanese hydropower stations. National Business Daily visited(in Chinese) the largest Bitcoin mining operation in Leshan, where there are over 5,800 machines going. In total, they generate on average 27 Bitcoins each day. Power accounts for 60% of the operational costs, with labor, broadband and other utilities making up the rest.

However, where there are opportunities, there are also risks. Seasonal variation in the electricity rate is an issue when mines have to be moved to ensure that the power cost remains low. The volatility of Bitcoin pricing as well as unfavorable regulations are factors that can turn business unprofitable in the blink of the eye.

Read more here:
Bitcoin mining operations follow cheap power to rural Sichuan - TechNode (blog)