Practice: fry the eggs, put the potatoes into the ham for a while, add the rice, pour in the prepared sauce, add the eggs, stir fry and cook until the sauce is thick. Two spoons of soy sauce, one spoonful of oyster sauce, one spoonful of vinegar, one spoonful of tomato sauce, one spoonful of sugar and half a spoonful of starch, add half a bowl of water and stir well.