Seed introduction: The seeds stored in the library are carefully selected from various countries around the world, including a wide range of varieties such as sorghum, soybeans, wheat, etc. Under the temperature environment of the seed bank, seeds of important crops such as wheat, barley and peas can be stored for up to 1,000 years. Among them, sorghum has been stored the longest, with a storage life of approximately 19,500 years.