Duck matters, but noodles, copper-pot hotpot, and breakfast stalls explain the city just as well.
Whether you go classic or local, duck works best when it is not squeezed between attractions.
If your group is large enough, order a half or whole duck with a few lighter side dishes. Popular restaurants often involve waiting, so place duck on an evening without a tight next stop. After dinner, a nearby walk works better than transferring across town.
Classic mutton hotpot is about the meat and the sesame dip, not the loudest menu on social media.
Copper-pot hotpot looks simple, but it is one of the better relaxed meals in Beijing, especially on a cold evening or after returning from the Wall. If your group is not used to mutton, ask about cuts and dipping sauce first so the meal stays comfortable.
Even if you skip douzhi, steamed buns, wontons, and sesame flatbread make an early morning worth it.
Do not turn breakfast into a completion list. Choose one or two small shops near your hotel or hutong route, start with easier items like buns, sesame flatbread, or wontons, and only try douzhi if you are curious. The morning feels more natural this way.
After this theme, return to the overview for the other entry points, or place it inside a route that fits your trip.