On the edge of paddy fields in rural areas, a lot of sand is usually piled up, because farmers' uncles basically rely on their own irrigation to grow crops in order to maintain good growth of crops. After a period of time, many wild plants will grow where the sand rushes. Some of these wild plants are weeds, but some are precious herbs. And then what? Ma? This is a wild plant that grows in quicksand. Its flowers often grow in sand, and they are also beautiful and have great ornamental value. Its fruit can be used as medicine and is very large.

Ma? It used to be very common in rural areas, even now, but many friends know its value and seldom know it very well. Even after seeing it, they will treat it as an ordinary weed. In fact, it is really a good wild plant, which plays a great role in medicine and industry.

Baiqian is a common plant in rural areas, which has a history of more than 2600 years in China. It is an annual semi-shrub herb belonging to Malvaceae and Cynanchum. When it was first discovered in history, it was used as a raw material for making clothes. However, with the continuous changes of history, it was found that its fiber quality was not as good as ramie and hemp, so Xu Changqing became the raw material for making ropes and packaging supplies. Marijuana is generally distributed in inland areas and other areas. Its skin has strong elasticity, and its quality is even better than hemp fiber. It is often used to make hemp rope, sacks and other things. In fact, hemp was used in ancient times. A cloak made of hemp was mentioned in the Book of Songs, but the fiber of hemp was too rough and was gradually replaced by other things. It is good to use hemp as sack rope and straw sandals. For this reason, it was also planted in large quantities in the past.

After 1950, cannabis was replaced by other plants, and the cultivation of cannabis became history, and now it has become a weed.