话说古代有个人请客,邀请了亲朋好友及地方众人来参加宴会,当时该地方以牛乳为最上品,凡请客必需要有许多牛奶供应客人。这人心想:“我如果天天挤牛奶,牛奶渐多,又无处安放,过几天也会发酸变坏。还不如先储存在牛的肚子里,不必每天挤出来,临到客人前来宴会那天,一顿都挤出来岂 Saying ancient personal treats, invited friends and relatives and local people to attend the banquet, when the place with milk as the most superior, where the customer must have a lot of milk supply guests. This people thought: "If I squeeze milk every day, gradually more milk, and nowhere to put, a few days will sour bad. Not as good as the first stored in the belly of cattle, do not have to squeeze out every day, guests come to the banquet that day Did you squeeze all the meal out?