Dendrobium nobile and Dendrobium candidum are two kinds of Dendrobium candidum which are the national key development. If the iron sheet is not good and the gold hairpin is not good, the country will not focus on development. Wang Long Town of Chishui City is the hometown of Dendrobium nobile in China, and Shuangfeng is the hometown of Dendrobium candidum in China. Therefore, both of them are good Dendrobium, iron sheet is suitable for health care, and golden hairpin is more suitable for medicine.