I'm a Fiji citizen and want to visit China and stay dea 9 to 12 months with a friend from China.

As I know, China and Fiji have a visa-free policy, so you can take your passport to Mainland China but you are generally allowed to stay for no more than 30 days. If you will have a long trip in China with about 9 to 12 months, I think the first thing you need to deal with is the China visa issue. You may get more detailed information through the Embassy of the People's Republic of China in the Republic Of Fiji. Maybe you can call their phone number: 00679-3300215 (Work Day 08:30 am - 12:00 am).