I have a question about Google.cn ( Google China) hope someone can answer it.

I understand that Google.cn is a chinese version of google therefor allows searching using chinese. Are people able to search using normal english also ? or just chinese.

In terms of its database of urls , does it only contain sites on the .cn domain ? or does it contain sites written in chinese or alternatively does it contain the whole of google.com's index ?

Also on about google.cn . I understand that google modify their index to suit the chinese government otherwise the chinese government would block people from inside china from viewing . In regards to this my question here is, is it possible to have a site that is unblockable by the chinese government ? if so how would it be done ?