What I have learned is that pork buns are delicious, greasy and soft. Common practices are: pork green onion, pork leek, pork cabbage, pork celery, pork lotus root, pork beans, pork green pepper, pork cucumber, pork carrot, pork spinach and so on. Made of Chinese cabbage, onion, ginger and other ingredients, it tastes delicious and refreshing.