Zhejiang West Lake Fish in Vinegar Sauce (Xi Hu Cu Yu)
Hangzhou, Zhejiang Province
Xi hu cu yu (西湖醋鱼) — West Lake fish in vinegar sauce — is one of Hangzhou's iconic dishes: a whole grass carp (li yu) is blanched in water with ginger and Shaoxing wine, then doused with a sweet-and-sour sauce thickened with starch. The sauce is clear, not red — using Zhejiang dark vinegar, sugar, soy, and ginger. Historically served on West Lake itself, at floating restaurants.