In order to sell goods, I learned by querying Enshi Civilization Network. Lecture sales means that merchants make customers fully know and understand the value of goods through a series of lectures, and then recognize them, thus driving commodity sales and increasing profits. Selenium-enriched granary is a national supermarket chain that sells selenium-enriched food. Through the nationwide network and supermarket chain stores, we sell various selenium-enriched foods such as rice, flour, grain and oil, and organic foods to customers.