Buy some preserved fruits, sugar, candied haws and the like. It says Beijing specialties, or buy some Olympic souvenirs, a Tang suit (which is sold in the clothing wholesale market, not expensive), or some gadgets, and bring two bottles of Erguotou. Roast duck has take-out and vacuum packaging. If you don't go home by car for a long time, you can also buy a packaged takeaway, but you have to go to a roast duck restaurant like Quanjude, about 100 yuan.