Do I need to apply for an extended visa? what are the requirements for European passport?

Tony, you should apply for a tourist type from Chinese embassy in your country before you go. It requires your passport, application form affixed with a recent passport photo, round-trip air tickets and hotel reservation. If you are able to provide the invitation letter from China, then air tickets and hotel booking are not required. By the way, it takes four working days to deal with your application.