Dried squid takes 6 hours to soak. Soak in hot water for 3 hours, then take it out, then wash it and put it in alkaline water (25 grams of caustic soda is suitable for 500 grams of squid), and soak it for 3 hours. After the squid becomes soft, wash it with clear water to remove alkali, then soak it in clear water and cook it.