First steam the crab, let it cool thoroughly, and then cut it in the middle with a big knife. Divide the crab in half. Be careful not to break the crab shell or fall off your feet. Then add the prepared sauce and simmer for ten minutes until the juice is almost dry. If you like sweet mouth, you can mix soy sauce and add more sugar. If you like spicy mouth, add soy sauce and less sugar, add ginger juice and spicy oil. Pay attention to thickening, that is, add some water starch to the sauce.