The lower the altitude, the longer the tail, and the higher the altitude, the shorter the tail. Most of the producing areas of Cordyceps sinensis are at low altitude, and few are at high altitude, only Naqu, Yushu, Lhasa and Changdu, and there are many long-tailed Cordyceps sinensis at high altitude. Cordyceps sinensis with long tail is also called late grass, and there are many medium-term grasses with long tail, so it is impossible to judge where Cordyceps sinensis comes from by the length of its tail. If you want to buy short-tailed Cordyceps sinensis, you can choose the first issue of Cordyceps sinensis from the direct selling network of Cordyceps sinensis origin. They specialize in the production of Cordyceps sinensis in Naqu, Tibet, the highest altitude. The first phase of Cordyceps sinensis selected by professionals has a short tail.