This. I have no idea why people thought it's a dilemma of choosing either send forces or wait out protests, but not consider the ethical, correct, and right option of giving what the protesters want.
So you protest to get everything you want? Not all protests are guaranteed to be just. What if the Mainlanders then decide to protest to stop the protests in HK?
I am not saying ALL protest objectives are right. I have no idea why you would generalize that. In this particular event, don't you think what the HK protesters ask for are just?