The idea in the minds of Hong Kong protesters that they can change the fundamental political philosophy of its parent government is childishly naive, least of all by the way they are now going about it..
The protesters should have quit while they were ahead. China already knows it can't make progress much beyond where it is today if it sticks to its uncompromising Marxist system of government. A gentler but more persuasive form of protest would be emigration among the Hong Kong educated young and capital flight among the Hong Kong wealthy, leading to a corresponding decline in inward investment and trade (and Singapore, South Korea and Japan rubbing their hands in gleeful anticipation). . Ultimately it will be witnessing that trend gathering momentum that will give Beijing pause for thought. Whereas what the Hong Kong protesters are persisting in will either land them in prison, hospital or under the ground, and the world will be awash in crocodile tears for about a week.