A local villager prepares black carp, a key ingredient to cook braised fish, in Vu Dai commune, Ly Nhan district, northern Ha Nam province, Vietnam, on Dec. 5, 2018. Fish braised in earthenware pots is a famous traditional dish of Vietnam's northern Ha Nam province. Its key ingredient, black carp, mixed with over 10 kinds of traditional spices, is put into earthenware pots and burnt by longan wood for 12-16 hours.(Xinhua/Ngo Minh Tien)

Local villagers cook braised fish in Vu Dai commune, Ly Nhan district, northern Ha Nam province, Vietnam, on Dec. 5, 2018. (Xinhua/Ngo Minh Tien)

Editor: Wang Shixue