1. Wash ginger, peel and slice;
2. Wash and chop the chives for later use;
3. Wash the trotters;
4. Make water in the pot and put in the trotters;
5. Remove blood foam after the water boils;
6. Add seasonings except sugar and chives to the pot and boil again;
7. Pour the trotters and soup into the pressure cooker and press for 1 hour and 30 minutes;
8. Pour the trotters and soup back into the pot, add granulated sugar and stir-fry until the juice is collected, then it can be out of the pot.
