A principal who organized a secret cryptocurrency operation at his school was fired after teachers noticed buzzing from the computer room.
According to the BBC, Lei Hua, principal of Puman Middle School in Chenzhou, Hunan Province, was released after being pulled out of ethereum for school purposes.
Mr. Hua managed to accumulate an electricity bill of 14,700 yuan ($ A2940) after using the power of the school to run the mining machines day and night.
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Mr. Hua started to dig the cryptocurrency home in an attempt to earn some extra money, but realized that the device was chewing 21 kilowatt hours of electricity a day.
He transferred the computer to school and added seven more "miners" to his operation.
In the end, the vice-principal of the school, Wang Zhipeng, joined him too, buying a ninth machine and also doing it on the school grounds.
Mr. Hua was fired last month, while Mr. Zhipeng was authorized to keep his job after receiving an official warning.
The BBC claimed that Mr. Hua had previously been warned of the unusually high energy bills of the school, which he claimed were due to the cooling and heating devices used in the classrooms.
But in the end, the teachers noticed a constant buzz, which led to the discovery of the machines that were installed in a computer room between summer 2017 and summer 2018.
Apparently, the mining scheme also overloaded the school's computer network and caused Internet connections to slow down, which affected teachers' ability to do their jobs.
According to Caixin Global, the "miners" of cryptocurrency work by solving "the mathematical puzzles that feed the network of a cryptocurrency".
The "coins" of the virtual currency are then rewarded, which can be converted into "hard" currencies.
However, the process also requires a large amount of electricity, which is the way in which the sigg. Hua and Mr. Zhipeng have been captured.
It is not known how much men have drawn from their program, even though the Chinese media have revealed that their profits had been seized by the Chinese disciplinary committee.
The computer security expert Matthew Hickey told the BBC that the educators' scheme would be obvious.
"The noise and heat of nine active mining machines would have been very obvious," he said.
Originally published as Principal fired for mining encryption at work