1: Yes, it is
2:The main ingredients to make “chung” cake are: sticky rice, green bean, fatty pork, black pepper and salt.
3: No, they don't.
4:First, sticky rice and green bean are dipped in water till expanded. Fatty pork is mixed with black pepper. Vietnamese use “dong” leaves to wrap them all inside. “Chung” cake then will be bolt in a large pot for about 10 hours or more.