Qing Hua has the best dumplings in Montreal.
I always order them fried instead of boiled as they are much more tasty.
The only downside to this restaurant, which if improved could really make the experience better, is the decor. The chairs, table, large empty fish tank, poor lightning all need a serious re-think. It's almost embarrassing bringing people here for the first time.
That being said, you'll come back time and time again for the great dumplings.