I live in Shanghai and they don't have Gap, AE, A&F, Hollister, etc., just retail stores.
There are literally millions of small unisex fashion boutiques though—shopping in Shanghai is great.
Of the ones anyone else would know, I wear mostly:
Polo, Lacoste, Adidas (i love their track jackets), Le Coq Sportif, Burberry, DKNY, french connection (stupid censor wouldn't let me type eff cee you kay), Dolce & Gabbana, Donna Karan New York
but most of my clothes are no-name designer clothes.