HK is a huge tragedy in the making, a leaderless movement and a government which people lost faith on. Everybody thinks HK is the one of the best places in the world. A prosperous HK is long term interest not just to Hongkongers, but also to China, U.S. and the whole world.
China know they need HK, don't want HK become just an ordinary city and Shanghai can't replace HK as financial center at least in 30 years.