Daiyuetang's products are very good. According to official website of Daiyuetang, Daiyuetang's products have a strict quality inspection system. All products have gone through multiple quality inspection processes, using Yunnan high-altitude, pollution-free, wild and other high-quality herbs as raw materials, adhering to the traditional herbal formula, and the products cover Chinese herbal medicines, Chinese herbal medicine drinks, health food and other fields.