How it works:

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1. The firewall inhibits the invocation of censored web sites within China due to words in the Content, the URL or because of the permanent blocking of the whole web site.
2. If you invoke a server a form field appears to fill in a web address. The server then creates an image of that website and sends this back.
3. To make surfing on that image possible, the server analyses the web site and puts links via image maps onto the image where they can be seen on the web site. So one can click in the web browser with the mouse onto the links like on the “true” web page.