@somebody nobody can stop the blockchain, but chinese gov can stop people who use this. And force them not to. That's quite simple to understand. What you post on blockchain will stay, OK that's right, but first you need to be able to post (if they dont block all IP / nodes/ access), then if you do, it can be illegal for you soon or later if they decide that it should be.
People can go in prison for doing this, so Nobody can stop the blockchain you're right, but people can be stopped very easily.