Another vote for Beyond, behind Zürich Hbf. Really excellent Chinese. My only complaint is that the service is slow. But the food more than makes up for it.
Visited Mitsu Mitsu recently and was surprised both about the taste of the food and sake. I think the cook used to work at Sala of Tokyo. Can't comment about the authenticity.
Asia Way In Oerlikon has been mentioned in the comments already but I agree. The quality is very nice and ha a wide selection of a la carte and lunch buffet.
They seldom get it right in China outside of Beijing so looking for it in Zürich is highly optimistic. Sorry to be a debbie downer, but username checks out.
Was at Ah-Hua yesterday for lunch thank you to all those who had recommended this restaurant.
Pro: Great variety, big portions, great tasting food!
Contra: The place is a bit dowdy, crowded and noisy tho'...And...if you plan on having starters followed by your main course(s) remember to specify this or else they'll just bring everything at once.
It sounds like you were at the Ah-Hua on Ankerstrasse. You should try the one on Brauerstrasse (essentially just around the corner). As far as I remember, it has the same food, but the place is smaller and has a spectacularly different atmosphere.
Ventured into Wesley's with a friend last week and was not disappointed. Wow! Tried the pork and vegetable bao and they were freaking amazing! Also tried the lunch special, garlic crispy shrimp and it was just perfectly cooked-- Fresh, tender, crispy, generous portion too. 18.50 CHF for the shrimp dish.
Yep, atmosphere is better in the smaller one, but the food was in my experience better in the bigger one. Getting food whenever it is ready, not in some predefined sequence is btw rather authentic... that's how it works in most of Asia.