If China stopped all activity bitcoin related to BTC it would for that period of time lower the hashrate of BTC.
Dealing with transactions until the next Difficulty update would make transactions terribly slow due to the high difficulty and lower mining power, but that would be a temporary thing. BTC's Difficulty has gone up and down over the last 10+ years and it will continue to fluctuate over time as well.
Not much in the long term would change for BTC if China stopped all BTC related Activities.
That's the point of Decentralization, one groups stops and others would come in due to the possibility of profits.
If China banned BTC it might actually shoot the BTC price up!
Dealing with transactions until the next Difficulty update would make transactions terribly slow due to the high difficulty and lower mining power, but that would be a temporary thing. BTC's Difficulty has gone up and down over the last 10+ years and it will continue to fluctuate over time as well.
Not much in the long term would change for BTC if China stopped all BTC related Activities.
That's the point of Decentralization, one groups stops and others would come in due to the possibility of profits.
If China banned BTC it might actually shoot the BTC price up!