Selenium tea, selenium rice, selenium oil. The development of selenium resources in shitai county mainly focuses on selenium-enriched agricultural products and selenium-enriched health preservation. Selenium-enriched agricultural products are mainly concentrated in nearly 20 varieties in five categories: selenium tea, selenium rice, selenium water, selenium fruit and selenium-enriched native products. By 2023, the largest production capacity will be the "three treasures of selenium": selenium tea, selenium rice and selenium oil, and the comprehensive output value of selenium industry will reach 650 million yuan.