1. Preparation materials: onion, ginger, star anise, kaempferia kaempferia, fragrant leaves, pepper, cinnamon, tsaoko, fennel, cardamom and dried tangerine peel.

Second, pour water into the pot.

Third, pour in soy sauce.

Fourth, pour in brown sugar and rock sugar.

Five, onion knot, ginger into the pot.

6. Finally, add all the spices.

Seven, after the fire boils, turn to a small fire to cook.

Eight, cook until the soup is thick (not too thick), which is 2/3 or 1/2 of the original soup.

Nine, filter out the residue.

Ten, the cooled soy sauce.