China once dominated global Bitcoin mining, at one point accounting for more than 60–70% of the worldwide hash rate due to its access to cheap electricity, large-scale hardware manufacturing, and established mining infrastructure. However, in 2021, the Chinese government imposed a nationwide ban on cryptocurrency mining, citing financial stability concerns, energy consumption, and environmental issues. This policy forced miners to shut down operations or relocate to countries like the United States, Kazakhstan, and Canada. After the crackdown, China’s share of global mining dropped sharply, contributing to a temporary decline in Bitcoin’s network hash rate. Surprisingly, some underground mining activity still persists due to China’s vast geography and access to unused energy sources, though it remains unofficial and risky. China’s regulatory shift significantly reshaped the mining landscape, accelerating decentralization and redistributing Bitcoin’s computational power across multiple regions worldwide.