According to the research results, the efficacy of Pinus massoniana and Pinus tabulaeformis, which are everywhere in China, is good. 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 are different from place to place, their main medicinal effects are all there. There are no Pinus massoniana and Pinus tabulaeformis in the local area, and Pinus elliottii, Podocarpus, Pinus densiflora, Pinus yunnanensis, Pinus taiwanensis, Pinus bungeana, Pinus bungeana and Pinus thunbergii can all be selected; It is found that the medicinal components of Pinus quinquefolius are the best, 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 Erpinsong is a little astringent. There are more Podocarpus in Shanghai, Jiangsu and Zhejiang, and the taste of Podocarpus is not astringent. Pine resources vary from place to place, and pine trees of the same species grow in different places and have different drug effects. In ancient China, there were records of eating pine needles and drinking pine needle tea and enjoying a long life. Ge Hong's Bao Pu Zi records a story about Qin Gong ladies-in-waiting: 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 over 300 years and their hair is black. Li Shizhen said in Compendium of Materia Medica: "Pine leaves, named pine hair, are warm, bitter and non-toxic, and enter the meridians of liver, kidney, lung and spleen to treat swelling and toxicity of various viscera and wind-cold-dampness syndrome." It is also said that it can treat swollen blisters, promote hair regeneration, strengthen the five internal organs of liver, kidney, heart, spleen and lung, satisfy hunger and prolong life. Sun Simiao also has a special liking for pine trees, and used the relevant parts of pine trees for curing diseases and keeping in good health, and established natural health-keeping methods such as "taking pine nuts, pine leaves and rosin".

Wash pine needles

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

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