Cannabis is one of the earliest fibers cut and used in the world. There are two types of hemp in China: early maturity and late maturity. The quality of early maturity fiber is excellent, such as linear hemp, while that of late maturity fiber is coarse and hard, such as kui hemp and kangzhou hemp.

Hemp is a kind of phloem fiber among plant fibers. It is also called hemp in Chinese, or hemp or hemp. Quebec hemp, commonly known as linear hemp, belongs to the mulberry family of annual erect plants, with longitudinal grooves on the stem surface, a height of 2-3 meters, palmate leaves, and 5-9 deep split compound leaves.