Hi, i am planning to marry my Chinese girl friend, i was told to get Single status certificate.

Your single status letter should be attested by the local embassy of your country and then authenticated by the local China embassy again. Besides this letter, your birth certificate also has to be through the same formalities. Nayway, you'd better consult the local China embassy or consulate about this once more to make a good preparation for your marriage in China. Congratulations to you and wish you a happy marriage life!