How many pages do I need in my passport for the china visa?

I'll be traveling with a group for 11 days to Beijing, Shanghai , and 4 day Yangtze River cruise March 1, 2014. According to your website, I won't be able to apply until I get all my travel documents. I have 2 full pages left in my passport, however they're not next to each other. Is this OK? My passport expires in 2016. I want to wait until then to get a new passport with extra pages. I'm just planning to apply for it by visiting the Chinese embassy in San Francisco, CA.