卤 (lǔ) names the technique: meat or offal simmered in a 'master stock' (
卤水 /
老卤) of soy sauce, rock sugar, Shaoxing wine, and spices (star anise, bay, cassia, fennel, Sichuan pepper). Stocks are reused for years and grow deeper with each batch. Sister dishes:
卤猪蹄,
卤鸡翅,
卤蛋.