2. After washing, put it in a large basin, add appropriate amount of water, salt and vinegar, and rub it continuously until the octopus's mucus is cleaned.
3. Wash octopus. Remove all the eyes, teeth and internal organs of octopus, and clean the ink of octopus. This cleaning process is relatively long.
4. Tear off the black "coat" of octopus from head to bottom. This is the most fishy part, so be sure to clean it.
5. Finally, wash it repeatedly, and the washed water will not be turbid, which means it is clean!