Several families that have come here from both the Mainland and Hong Kong suggest this place:
2945 South 108th Street
Milwaukee, WI 53227
It seems to be a staple for special birthdays/celebrations/etc. We were taken there by one family that pre-ordered a "traditional special meal" that was only done for groups of six or more - very well done and tasty. I know that there are many cuisines in China, but families from the varying areas always suggest this place.
A former co-worker from the Mainland said that he went out of his way to get groceries around the corner from Fortune at
Mei Hua Market
10706 West Oklahoma Avenue
Milwaukee, WI 53227-4144
But I was not as impressed with them as I have been other Asian supply stores.