As for the bags, i would go with a suitcase, a computer bag and a purse.  The computer bag should be big enough to hold the computer, documents, and other necessary items.  The purse to hold you personl items like wallet, makeup, keys, phone etc. 

Dress professionally, i would go with a high heel to give yourself a little more height advantage as most chinese woman tend to be on the petite side.  Do go with a large heel though rather than stiletto for comfort and support.

Good luck with you interview.