How to pickle buckwheat head?

The practice of sweet and sour buckwheat head: the proportion of ingredients: buckwheat head 5 kg, sugar 1 kg, salt half kg, vinegar 2 kg. Production method: Wash buckwheat head, soak it in salt water for 7 days, take it out and dry it, then put it in a container (or small jar) with other ingredients and seal it. It will be fine in 20 days. The buckwheat head pickled in this way tastes sweet and sour, crisp and slag-free.