Unless, of course, you host an opinion that is so unpopular it has been declared unlawful (say, with regards to child porn or advertising assasination services

Unless, of course, you host an opinion that is so unpopular it has been declared unlawful (say, with regards to child porn or advertising assasination services or something). In that case you would soon discover that any society censors certain opinions. It's just that the Chinese government has a different opinion than most westerners about which opinions are intolerable.