I've been to China on a few occasions. While many of the major news sites i.e., CNN and The New York Times, are accessible, those that have a lot of user-generated content i.e., sites hosted by GoDaddy or Geocities are not always accessible. Things are continuing to change, so that situation may also change in the future.
Speaking of change: One of Beijing's hutongs. Beijing's hutongs are continuing to disappear as the city replaces them with modern commercial and residential districts.