That's because compared with small factories, they are big brands, and their prices are similar to those of Tong Ren Tang and Lei. First of all, we must ensure the quality of raw materials, such as which land is more nutritious, whether the land is polluted by modern industry, and whether the raw materials meet the pharmacopoeia standards, which opens up the difference in raw material costs. Secondly, in order to ensure the safety, sulfur-free, pesticides-free and heavy metals-free of traditional Chinese medicines eaten by customers, each batch of medicinal materials has undergone comprehensive testing. There are also raw materials to finished products, leaving only the best quality 1/3 for sale. Finally, there is the most crucial point. Their products are all packed with environmentally friendly materials. Environmental protection materials must be very expensive, and it must be safer to store medicines and food. They are also a brand with social responsibility.