Help traveling to China after teaching contract is up, but ARC not expired.

I am currently teaching in South Korea until August 31, 2011, when my contract is completed. I would like to travel to China on September 2nd.

The new rule indicates that foreigners must provide their alien registration card in South Korea with at least 6 months remaining validity. My card however does not expire until September 30th, but my contract is over on August 31. Will this prevent me from traveling to China early September?

Please let me know at your earliest convenience.
Samantha Chappell