** What happens to me if I publicly criticise a policy my government has implimented? Nothing! Free people can criticise their own government. Without freedom of speech, people simply aren't free. We in the west are free at the moment, but there are people in the west who are trying to destroy freedom of speech, namely radical Muslims, CCP supporters, and the hard left. For an example of how the left is trying to stop views they disagree with from being expressed in public see here. For how they are using conservative politicians to their advantage, see here.
The Chinese Communist Party (CCP) wisely adopted capitalism; the country would have collapsed if they did not.* (See chapters 6-8 of of George Reisman's book Capitalism for a detailed look as to why price controls and government ownership of the means of production cannot work as an economic system. In the following Reisman explains why communist governments have always oppressed their citizens. See here. )
Freedom of speech
The CCP will not allow ethnic Chinese (whether in China or oversees) to publicly criticise any of its policies or actions (for examples see Silent Invasion by Clive Hamilton). But despite this, the world as a whole, is beginning to wake-up to CCP Propaganda.**
Now I understand that it would not be wise for the CCP to introduce freedom of speech overnight (otherwise they risk destabilising the country and being imprisoned for crimes committed against their own people, see here); but perhaps they could attempt to introduce freedom of speech one issue at a time. Because of tensions in Northwest China, the Uighurs might be a good place to begin. (The Chinese government realises it has a very big problem (see The Third Choice). But China cannot continue to treat the Uighurs as they have been, and not reap the consequences. See China vs Islam.)