According to the research results, Pinus massoniana and Pinus tabulaeformis, which can be seen everywhere in China, have better efficacy. These two kinds of pine trees are bounded by the Yangtze River, which basically covers most areas in the north and south of the Yangtze River. Although it is considered that the components of Pinus massoniana and Pinus tabulaeformis vary from place to place, their main medicinal effects are all in. There are no Pinus massoniana and Pinus tabulaeformis in the local area, and Pinus elliottii, Podocarpus, Pinus densiflora, Pinus yunnanensis, Pinus taiwanensis, Pinus bungeana and Pinus thunbergii can all be selected. It is found that American ginseng has the best medicinal components and the taste is not astringent. The medicinal components of four-needle pine and three-needle pine are slightly inferior to those of five-needle pine, but the resources of five-needle pine are less. The taste of the second pine is a little astringent. There are more Podocarpus in Jiangsu and Zhejiang provinces in Shanghai, and the taste of Podocarpus is not astringent. Pine resources vary from place to place, and the same species of pine grows in different places, and its efficacy is also different. In ancient China, there were records of eating pine needles, drinking pine needle tea and enjoying a long life. Ge Hong's Bao Pu Zi records a story about Qin Gong maids: at the end of Qin Dynasty, Liu Bang and Xiang Yu invaded Xianyang. During the war, the ladies-in-waiting fled into the deep mountains, and under the guidance of the old people in the mountains, they only ate pine and cypress and pine needles. As a result, all faces are rosy, and they are not afraid of freezing in winter and heat in summer. Legend has it that these ladies-in-waiting have lived for more than 300 years, and their hair is black. Li Shizhen said in Compendium of Materia Medica: "Pine leaves, named pine hairs, are warm in nature, bitter in taste and non-toxic. They enter the meridians of liver, kidney, lung and spleen, and treat all viscera swelling and toxin, and wind-cold-dampness syndrome." It is also said that it can cure swollen blisters, promote hair regeneration, strengthen liver, kidney, heart, spleen and lung, and satisfy hunger and prolong life. Sun Simiao also has a special liking for pine trees, and uses the relevant parts of pine trees for curing diseases and keeping in good health, and establishes natural health-keeping methods such as "taking pine nuts, pine leaves and rosin".

Cleaning pine needles

Pine needles are oily plants, which are easily contaminated with dirt and difficult to clean. Use greasy detergent and clean it carefully. Brush with a soft brush; Or wrap pine needles with soft cloth dipped in detergent for washing. After washing, soak in water for a while. Boil pine needles and boiling water:

Cut the washed and soaked pine needles into three sections, put them in a casserole or stainless steel vessel and add 600 ml of water to cook them. 10-15min and boil 300ml.