Chilies pickled with salt and vinegar or fermented in brine until soft, with a sour heat. Sichuan cooks mince them with ginger and garlic and fry them in oil as the base of fish-fragrant dishes.
People in Sichuan often add pickled chilies when they stir-fry, so the food tastes sour and spicy.
Tips
culture
泡椒 are chilies kept in salted brine in a sealed jar, the way 泡菜 is made, so they taste sour and salty as well as hot. They flavour 泡椒凤爪 'pickled-chili chicken feet' and are the base of the 'fish-fragrant' 鱼香 sauce.