all sea cucumbers in Korea are in an undeveloped state, the water quality is clean, there is no oil pollution and antibiotic residue, and the annual average water temperature is lower than that in most parts of China due to the influence of the Yellow Sea cold air mass, and the sea cucumbers grow slowly. The sea cucumbers grown under this condition have more solid meat, richer nutrition and better quality. Due to the excessive development of sea cucumbers in China, the pollution of seawater and the abuse of antibiotics, the quality of sea cucumbers has dropped sharply, and the quality is obviously not as good as that of sea cucumbers in Korea. There are four rows of thorns and six rows of thorns in Korean sea cucumber. Buy a regular brand.