Have you seen Red Dawn ?
the 1984 movie? yes. tho that was cubans with russian support
for an updated version, check out:
Tomorrow, When the War Began (2010)
http://www.imdb.com/title/tt1456941/
australians invaded by the chinese (tho the red star is blackened)
Red Dawn was better produced ... but i wouldn’t knock TWTWB for that (there also might be a few in the works for 2012 and 2013 release)