Is BTC used in China?

Is the cryptocurrency Bitcoin, commonly abbreviated as BTC, currently being utilized within the borders of China? I've heard rumors about its legality and acceptance in the country, but I'm not entirely sure about the current situation. Could you please clarify if BTC is actively being traded, invested in, or used for any transactions in China? I'm particularly interested in understanding any legal constraints or regulations that might affect its usage. Additionally, I'm wondering if there are any significant trends or patterns in the way BTC is being employed in China, compared to other countries. Your insights would be greatly appreciated.