1. Pickling is a very effective way to preserve vegetables at an early stage. Nowadays, the pickling of vegetables has changed from a simple fresh-keeping method to a processing technology of vegetable products with unique flavor. Kimchi, a traditional food, is the crystallization of China people's wisdom through the ages and a part of the precious cultural wealth of the motherland.

2. Pickling is a method of making fresh fruit or raw materials processed by other methods into food by using the fresh-keeping function of salt.