1. Sea salt contains iodine, but the content is very small. Sea salt is a salt made from seawater. Seawater enters the evaporation pool through tidal absorption, and is concentrated by sun evaporation to make saturated brine, which continues to evaporate and crystallize in the crystallization pool, and then is collected manually or mechanically and piled up to complete production. Sea salt has low sodium chloride content, contains a variety of trace elements needed by human body, and does not add any anti-caking agent.

2. The collection of sea salt is more complicated than other salts, which can retain more trace elements in seawater, instantly stimulate and retain the original taste of ingredients, and make them fresh, salty and delicious. It is mainly divided into coarse salt, fine salt and flake salt, which are refined by evaporating seawater. The production process of sea salt is complex, the production cycle is long, the production cost is high, and the taste and quality are good. Due to different producing areas, the quality of sea salt varies greatly. Hangu saltworks area is located between 117-118 east longitude and 39 north latitude. It is a gold producing area of sea salt, and is suitable for drying high-quality sea salt.