Taiwanese/Szechuan food is probably the number one Asian food you can find in Pittsburgh. There are so many good competitions that you end up actually having to make an effort to decide where to go. Ting's Kitchen is my choice if I am up and about on Mcknight. Their "wife and husband" appetizer (spicy tendon and tripe) is so good. It honestly beat out this other michelin-star chinese restaurant I went to in NYC. I also enjoyed their tea-smoked duck, fish in spicy broth... and I love that their menu is extensive so I can always try new things, or stick with my favorites. The restaurant is fairly empty whenever I come by, but the food is on point. Everything I order is super spicy.. I love and hate it at the same time.
Just a fair warning, if you don't order spicy food here then (maybe) you're not doing it right! Don't come expecting authentic chinese food but order something Americanized or typical. Taiwanese/Szechuan food is very distinct. Ask for recommendation and be daring cause the food is on damn fireeeeeee (I mean spicy, not literal or overhyping).