2. Soak the blood, then rinse it under the tap to drain the water.
3. Wash the onion and ginger, tie the onion into knots, and cut the ginger into large pieces.
4. Put the ribs and onion ginger into the electric pressure cooker, and then add the right amount of water. The water just overflows the ribs, and then press the "ribs" button. If you need to go out to work, you can calculate the time and cook according to the reserved time.
5. When the float falls naturally, take out the onion knot, add the wax gourd slices, proper amount of salt and chicken essence, cover the lid and press the button, unplug the electric pressure cooker after boiling, and stew the wax gourd with residual fire.