A freedom does or does not exist. Some cultures have more freedom than others. If it's "Western" of me to admit I prefer more freedoms rather than less, I'll very proudly own up to that. But I don't know what that has got to do with the question I answered.
As for concrete examples:
#1: Freedom of speech -- one may not advocate for LGBTQ+ rights, criticize the ruling party, advocate for a change of government or political system in China, state that Taiwan is an independent nation, argue in favor of free and open elections in Hong Kong, advocate for workers' rights, talk about Tiananmen Square, talk about human rights abuses in Xinjiang, talk about human rights abuses in China at all... and the list goes on. Someone might manage to do so, sneaking past the firewall, but they are liable to be slammed with #3 below.
#2: Freedom of association -- contrary to what one might expect in a country with "Socialism with Chinese characteristics", one may not unionize. In fact one may not set up any civil society group outside the approval of the CPC. I could editorialize on the reasons for this but I'll refrain in the interest of brevity.
#3: Freedom from arbitrary detention -- China has a specific category of criminal offense just for this: being able to detain anyone at any time for any reason. The crime is "Picking quarrels and provoking trouble", and is used liberally on anyone who speaks out against the government and manages to catch their attention. https://en.wikipedia.org/wiki/Picking_quarrels_and_provoking...
Now, Chinese people, and others, will argue that there's this reasona and that reason why it's good to restrict freedoms in this way. I obviously disagree. But what shouldn't be in dispute is the fact that these freedoms are very much restricted in China.
