Beijing Roast Duck: It's the most famous, but it's not easy to keep its original flavor after taking it back. You can also buy some for your relatives to taste. You must buy Quanjude. There are too many fakes in the market. Go to his restaurant (Heping Store, Qianmen Store and Wangfujing Store) and buy vacuum-packed lotus leaf cakes, as well as his special roast duck sauce. Go home and barbecue the ducks in the microwave oven. Steam the lotus leaf cakes on the pot, cut some scallions, dip them in the roast duck sauce and roll them up.
chestnuts in Liangxiang: Yes, there are bags and gift boxes in the supermarket, which are convenient to carry and keep.
pickles in Beijing: there are bags and bottles in supermarkets, and there are many kinds. Liubiju and Tianyuan Sauce Garden are the most famous, and I think Tianyuan's is better. Tianyuan's hemp golden silk is excellent, and sweet sauce nectar is also good.
Zhajiang Noodles, Beijing: Do you know how to fry sauce? If so, I will buy several generations of dried yellow sauce to give my family a taste of Zhajiang Noodles, Beijing. It is also the most famous sauce garden in Liubiju and Tianyuan, and the most delicious one is Guixinzhai in Beijing. Now it has been swallowed by Liubiju, but it also makes its own dried yellow sauce, with the trademark Liubiju and the name Guixinzhai, which is different from Liubiju's sauce. Real old Beijing loves his sauce, which is not easy to see in supermarkets.
candied haws: there are small bags in the supermarket.
except for roast duck, all the above things can be bought in a big supermarket, and the price is cheap. Go and have a look around.