The "sugar" in the name isn't really the point — it's mixed with hot sand and stirred like a slow stir-fry so the shells crack evenly without burning.
Chestnuts are tumbled in a huge wok with hot sand, a little maltose syrup, and oil, roasted low and slow until the shells split and the nut inside turns soft and faintly sweet. Vendors scoop them hot into paper cones straight from the wok.
Chuan'r (Grilled Meat Skewers)
Youtiao (Fried Dough Stick)
Tanghulu (Candied Hawthorn Skewers)
Malatang (Self-Serve Spicy Broth)