The United Nations and the CIA are the main two sources I use when I need this sort of information.
The CIA world factbook can be found at
https://www.cia.gov/library/publications/the-world-factbook/The UN human development indices can be found at
http://hdr.undp.org/en/statistics/hdiI have no idea whether your government's firewall will allow you to access them. I've actually tried to visit certain websites while surfing the web in China and have had some trouble, but I can't recall whether I have tried to access either of these from China. I don't think that either of them are particularly subversive, so I'd imagine that it should not be a problem, but I'd be interested to know whether you can get through to them. Cheers.