If you're in Aurora and you want Chinese food... I would recommend driving to Richmond Hill. But if you are in Aurora, "Aurora Chinese Restaurant" is available. It's the only place in the area, that I'm aware of, that does dim sum. The quality is so-so. The prices are above average. Definitely check the prices of what you're ordering, because a bunch of really standard dishes are "J", meaning 8.99, which is a lot for dim sum. They have a good amount of selection for both dim sum and the regular menu. You can do so much better for price and quality elsewhere though (outside of Aurora).
If you order off the regular menu, I would recommend the sauteed beef and onion dish. The beef was cooked really nicely.