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Chopped-up pig intestines with wheat bread may sound repulsive - or like a very humble pie. But it's a traditional local delicacy in Beijing: luzhu.

It consists mainly of pig intestines and lungs, streaky pork, fried tofu and huoshao (baked wheat bread).

The ingredients need to be stewed for several hours, along with dozens of different flavorings that may vary with the seasons. And then all the ingredients will be chopped up and served with broth.