If you are in love with shopping, you should download Taobao. You can find literally anything there: food, clothes, games, make-up, decoration… there is no limit! Sometimes you will get the weirdest things recommended there, so it’s also a nice time killer searching for the funniest stuff. Another nice feature of Taobao is that you can order your normal groceries from several supermarkets, too.
Of course, Taobao is also only available in Chinese. However, after one or two orders you will get used to it and buying stuff will get super convenient.