I'll tell you how to sauce beef: First, make sauce soup. The seasoning is galangal, dried tangerine peel, cinnamon, nutmeg, clove, fragrant leaves and fennel, and put it in a seasoning bag for later use. Cut the green onion and slice the ginger. Add a small amount of vegetable oil to the wok, stir-fry onion and ginger, add 1cc of clear water or pork bone soup, add seasoning package, soy sauce and salt to taste. Boil it and pour it into the electric pressure cooker. Wash the beef tendon, blanch it with boiling water to remove blood foam, rinse it with cold water, put it in a pressure cooker and stew it for 5 minutes.