Accessories: 4 pieces of star anise, 3 pieces of cinnamon, 4 pieces of fragrant leaves, more than 20 pieces of pepper, 4 pieces of ginger and 6 teaspoons of salt.

Step 1: Cut off both ends of the green beans with scissors.

Step 2: clean and drain water.

Step 3: put it into a boiling pot, and add water until it is less than 1-2 cm.

Step 4: Prepare spices.

Step 5: Cut a few slices of ginger.

Step 6: put spices and ginger into a boiling pot and add salt.

Step 7: Boil over high fire, turn to medium fire for 10- 15 minutes, turn off the fire after cooking, and soak for more than 4 hours before eating.