Northeast pickled cabbage is a northeast delicacy, with mustard as the main ingredient and sour and refreshing taste after pickling. The pickling method is simple. Wash mustard, air dry it and put it in a jar. Boil salt water and add ginger slices, then pour it into the jar, seal it and put it in a cool place. Pay attention to keep the temperature and humidity and avoid direct sunlight. Can be taken out and eaten after one month.