Regarding the specific situation in Hong Kong, it has been a major hub for crypto-related activities, including exchanges and blockchain projects. China invests a lot of resources in that.
Both China and the US have shown interest in blockchain technology, but their approaches and regulatory philosophies differ. The US has taken a more cautious and fragmented regulatory approach, with various regulatory bodies involved. China, on the other hand, tends to have a more centralized and controlled approach, mostly because of their politics.
China have some interesting statistics about producing almost 60% of world's goods, their perspectives are limitless imo.
because the two countries are currently fighting over who has the strongest currents in the trading sector, so they are especially careful in the crypto field to do that.
technology in crypto is good even though a few years ago in fud to btc experienced a 90% decline from ath, but now it seems that several countries have focused on that.