The whole grass is fragrant. In Japan, it and perilla are both used as aromatic vegetables in cooking. Essential oils can be extracted from plants and used as medicinal plants. The seeds will swell after being soaked in water, and the surface of the seeds is covered with a layer of colloidal substance. This gelatinous substance is used to wash eyes in traditional Chinese medicine and to remove impurities (dust, etc.) in folk. ) from the eyes.

"Gold does not change", also known as basil or spearmint, is a huge family. At present, there are sweet basil, holy basil, purple basil, green basil, dense basil, short purple basil, lemon basil and so on.

"Gold does not change" is a smooth or basically smooth upright panicum miliaceum with a height of 60 cm -70 cm. The whole grass is full of fragrance, the stems are pure quadrangular, the plants are green and sometimes purple. The leaves are opposite ovate, 2.5 cm -7.5 cm long, whole or slightly serrated, with long petiole and dark oil spots below. On the terminal spike, there are also racemes growing at intervals, among which 6 -8 flowers are born in Hua Lun and have small white or red flowers. The fruit is a small nut, and the seeds are oval, small and black. The seeds swell and are covered with water.

There is no strict choice for soil quality. In dry, flat and fertile soil, it is best to plant it in sunny places. In tropical or subtropical areas, soil preparation will be carried out in February and March, with the border width of 60 cm -75 cm, perforated and covered with soil, and the spacing between plants is about 20 cm. 3 -4 times of intertillage weeding, and several times of harvesting in autumn. Compost and lime should be applied during soil preparation, and nitrogen and potassium fertilizer should be applied after the first leaf extraction. When collecting other seeds, the pedicel becomes Huang Shi, cut it from the stem, dry it, and knock off the seeds.

The fragrant young stems and leaves of "golden" are used as aromatic vegetables in salads and meat dishes. After harvesting at flowering stage, it is dried and stored in powder form, which can be used as seasoning at any time. When taking medicine, it can strengthen the stomach and digestion, promote diuresis and strengthen the heart, stimulate the uterus and promote delivery. In addition, this kind of seed is called Guangming Zi in Chinese medicine because it can treat eye pain after taking it. China also used it as a substitute for Linglingxiang and Eupatorium odoratum in the market. The essential oil extracted from leaves is yellow-green, and its components are methyl kaempferol, linalool and eucalyptol.