China is a country of 1.4 billion people covering the third largest country in the World.
It is one of the oldest civilizations, and has been ruled by many hereditary monarchies, or dynasties, with ruling Emperors who ruled, often very brutally, over many, many centuries, in an attempt to keep a rather fractious peoples together as one, especially after the First Emperor, Qin Shi Huang (Chin), of the seven unified states of China, that he brought together from 259 to 210 BC.
It is a country that has a great, tumultuous, history, with much war and death, whilst enjoying a great trading tradition, and of course infamously attacked by Japan during the lead up and during WW2. It has gone through many political upheavals as it's leaders still try and keep the population together in political thought and obeying "the system" of a particular time. It has been through the Great Famine under Chairman Mao that killed, it is estimated, 36 million in 1959-62, that is after losing 20 million during WW2.
Now, I am certainly no expert on Chinese history, but it is hard to judge their political system, that wants to control it's people in anyway it can, with ours. The history of our, small, Island, with a population of now about 66+ million, covering 209,000 square kilometres, has been shaped by Emperors, Kings Queens and one Lord Protector, then progressively, often via quiet 'revolution' of the people, fighting and striving for the democracy, that we have now. It has taken almost 2,000 years to get there.
Now with China, with that aforementioned population of 1.4 billion, over almost 10,000,000 square Kilometres the struggle for democracy has, and will, take much longer than for the UK. Change is coming, their World is changing, and they are becoming far more open and capitalist than ever before. Little old Hong Kong may well just help that process, but like with our country, it will still be a long and painful road to self fulfillment for the individual Chinese. We, the West, MUST NOT intervene in anyway in this natural process, until the Chinese themselves request our help, as Great Britain did, with the Dutch in particular.
What the Chinese do is, and will continue to, disturb us but this is a foreign country, and we should all respect that, United Nations, or any other involvement would be totally wrong and do no good at all. They will find their own path,
Also do not forget that, once everything is taken into account, the USA debt with China is around $22 Trillion!!