Want to lean meat tender mainly lock water, to meat inside the water, you can ginger and onion stirred with water to make onion and ginger water, meat cut up while adding onion and ginger water while mixing with the hand, little by little adding water while mixing until the water can not be absorbed, mixing in one direction, and then add seasoning, and finally add sweet potato starch and mix well. Must be sweet potato starch is good, slightly more.