It is difficult to provide a general statement about the principles of democracy that have been violated in China and Mexico, as the specifics of democracy and its principles can vary from country to country. However, some common principles of democracy include:
1. Political equality: All citizens have an equal right to participate in the political process and to have their voices heard.
2. Political freedom: Citizens have the right to freedom of expression, association, and assembly, and to participate in the political process without fear of retribution.
3. Rule of law: The government is subject to the law and is accountable to the people.
4. Separation of powers: The government is divided into separate branches, each with its own distinct powers and responsibilities, to prevent the concentration of power and ensure checks and balances.
5. Human rights: The government is responsible for protecting the fundamental rights of its citizens.
It is possible that some of these principles have been violated in China and Mexico, but without more specific information it is difficult to say which principles have been violated and to what extent.