In the Neolithic Age, our ancestors had invented hoes made of stones to grow crops. After the Han dynasty, because the hoe made of stone was not durable, the Han people changed it to iron hoe, which greatly increased its durability. The hoe is divided into two parts. The first part is the "hoe blade", which is used to loosen the soil and weed. The shape of hoe blade is flat and long, just like a kitchen knife, which is a quadrilateral kitchen knife shape. This is the most common hoe, but some are special, such as rectangular, narrow, stepped, etc ..., and "handling" is the second part. The handle is a wooden stick. The handle is used to install a hole behind the hoe blade to support the hoe blade. The length of the handle ranges from 80 cm to 160 cm, which is long or short, but it will be more convenient if it is long, because farmers don't have to bend down so hard.