most chinese eat out places are fastfood style, one plate offerings like sweet sour pork , otherwise the proper ones are quite expensive.. best bet for authetic affordable asian food is DIY, unfortunately...
the Helvetiaplatz morning market is a great place for sourcing meat for me with a huge variety from bunnies, pigeons, wildpork, chicken, beef, etc.. the Familie Fiechter , every Friday
there-s one fast food, Hua Thai at Escher Wyss Platz, authentic thai restaurant can b found at Langstrasse area
best of luck