The method of skimming oil is: chop a kilogram of lean beef into paste, blanch it in boiling water, add water to boil the bitter sausage of freshly slaughtered beef, filter it with gauze for later use, then cut fresh leek and fennel into sections, squeeze out the water, and then mix the beef paste and bitter water with spices such as fragrant willow, salt, Chili noodles and monosodium glutamate to serve. The way to eat pie is to dip rice noodles or shredded tripe and sliced meat in the pie. Free and easy is a typical kung fu dish, with exquisite craftsmanship, fresh materials, complete seasonings and long time consuming.