Material preparation: a basin of suitable size, salt and water.
1. Add a proper amount of salt to the water, then put the octopus in it and rub it with your hands until the mucus on the octopus surface is cleaned.
2. Then find out the octopus's teeth and take them out.
3. Then skin the octopus and tear it off the head. Finally, wash the octopus again. Clear water means clean.
5. Finally, squeeze out all the internal organs and clean the ink. Take out all the internal organs of the octopus.