Last month, Beijing called for measures to stamp out bitcoin mining amid concerns over its environmental impact.
In the case of bitcoin, these computers are racing to solve complex math puzzles in order to make transactions go through.
Currently, rewards to miners are capped at 6.25 BTC.
Meanwhile, the network difficulty of bitcoin — a measure of how hard it is to mine bitcoin — went from a record above 25 trillion in May to 19.9 trillion last week.
Bitcoin has nearly halved in value since reaching a record high of almost $65,000 in April.