What are the local products of Chongming?

Features of Chongming's specialties: Due to geography, climate, soil, folk customs, traditional crafts and other reasons, Chongming's agricultural and sideline products have obvious local characteristics, such as crisp shredded sweet potato, crispy white lentils, delicate old Chongming wine, Chongming cake that can be preserved all year round and can be eaten all the time.