URL'S permitted by the Chinese government

I was browsing merely browsing and I saw this website called the Great Firewall of China so out of curiosity I checked both of my URL'S they were knocked back so I tried my family page site but it was allowed; My curiosity really piqued me now so I tried a few friends blog URL'S all of them from blogspot was knocked back; I am wondering why as know I might and have got cranky with the red Government but not all of them I suggest you try it yourself Click on the link to enter your URL please.