2. Maoxuewang originated in Chongqing and is a traditional famous dish. Because duck blood is cooked and eaten, the main ingredient is tripe chop suey, so the name is given. "Mao" is a Chongqing dialect, which can be understood as rough or sloppy. This dish has a long history and has been popular since the 1940s. Now it is one of the dishes that diners must order.