What requirements do i need to visit my band member friends in China?

I am married 15 years to a British and have Permanent Resident visa in Perth Western Australia and full house wife. I have been granted visas in most countries i applied, infact most of them are granted multiple entry. I have dependent visa in Singapore and valid till June, 2012. I want to visit my band member friends in China this month February, Wat requirements do i need.?