Add ginger, green onion and star anise to a pot of water and bring it to boil.
Cook trotters over medium heat for about 40 minutes until tender. Take trotters out and immerse them in ice water until they become cold. Drain.
Put trotters into Seasoning Mix and Put trotters into Seasoning Mix and soak for 6 to 8 hours in a fridge. Drain and serve cold.soak for 6 to 8 hours in a fridge. Drain and serve cold.