1. Beef ham is soaked in water for 3 hours, and then cut into pieces.

2. Crush garlic and slice ginger.

3. Hot pan cold oil, add ginger and garlic and stir-fry until fragrant (there are bubbles on the surface)

4. Add beef pieces and stir-fry until the meat turns white, then add soy sauce and soy sauce and stir-fry to color.

5. Add cooking wine and stir fry for a while.

6. Transfer the stir-fried beef to the pressure cooker, add water until the beef doesn't pass, add star anise and cinnamon, cover the lid, cook on high fire until the pressure cooker makes a splash, and then cook on medium fire for 15 minutes.

7./kloc-after 0/5 minutes, let out the gas inside, open the lid, add chestnuts, cover the lid, and cook for another 5 minutes on medium heat.

8. Open the lid, add half a spoonful of sugar, and collect the juice after the fire boils, and then serve.