I'm going to China tomorrow and will be there for 10 days (counting flights). I don't need to wear anything fancy and I'd like to pack light (without having to do laundry while I'm there). Do you think bringing three pairs of pants (all nice jeans) is enough? That means I'd have to wear each 3 days. I'm going to be mostly in urban areas and the weather should be in the 80s and a little stormy. Thanks! Also, do you think one warm item (i.e. sweatshirt) will be enough?