China Update: A small miner on a forum got a call from authorities. They researched his home business and worked out that it did not require as much kWh as he was consuming. They suspected he was #bitcoinmining and will pay him a visit to inspect, ‘with force if needed’. 1/ Underground #bitcoin farms may exist in China, yet they run at great risk and some have trouble with low water levels. Turbines at rural hydroelectric plants cannot run unless more rain comes. Such farms charge up to $0.10 cents per kWh. 2/