1. Wash fresh leeks and soak them in clear water 1 hour.

2. Take out the soaked leek, drain the water, and then marinate the leek layer by layer in a porcelain jar for 2 days (stirring twice a day).

3. Take out the pickled leek, knead it a little, and then soak it in a porcelain jar filled with salt water for 5 days (inject 1000 ml cold water into the porcelain jar in advance).