According to Coindesk's article, "Bitcoin Mining is starting a new round of bidding wars," the second-hand mining equipment is operating more efficiently as bitcoin prices rise. The bull market that started in mid-April made the miners operate more profitably, so the mining machine is more valuable. In recent weeks, the price of second-hand mining machines has almost doubled, and the price of old ant miners on Bitland is currently between $250 and $320. In addition to the soaring price of bitcoin, people's general expectations of cheap hydropower during the summer's abundant water resources in China may also be one of the reasons for the growing demand for mining machines. Mining farm operators in southwestern China have previously estimated that more than 1 million machines will be in operation in the region this summer.