If you want to go to the shopping center, you can buy a fat woman's, which is an advertisement made by Fang Qingzhuo. All big shopping malls have this brand. But unfortunately, I don't know if you are a gentleman or a lady. If you are a gentleman, don't take it amiss! You can also go to Xidan shopping mall, where there are many brands that make big clothes. It's not your friend, it's Xidan Shopping Mall!
You can go to Wudaokou and Xinjiekou if you want to go to a small shop! The whole street is full of foreign trade clothes, including large ones.
You can also look at sports brands! Like Nike.