At the turn of the Spring and Autumn Period and the Warring States Period, with the appearance of iron farm tools and the use of Niu Geng technology, China entered the Iron Age. Cultivated land is continuous, labor-saving and effective, which is an important reform of farming technology. ?

Niu Geng began in the Spring and Autumn Period and the Warring States Period in the East. After Shang Yang's political reform, Qin came from behind and was widely used. At that time, horses were also used to cultivate land. In order to attach importance to agriculture, Shang Yang stipulated: "Those who steal horses die, and those who steal cattle add." It is said in Salt and Iron Theory that "the ancients" used horse-drawn carts when walking and "stopped farming". The "ancients" mentioned by the Han people refer to the Warring States and the Qin Dynasty. Development of modern archaeology

At present, many kinds of ironware, such as iron plows, have appeared in ancient tombs in the late Spring and Autumn Period. ?

Niu Geng technology appeared in the Western Han Dynasty, which marked the progress of productive forces at that time and the agricultural society reached a new height. ?

Niu Geng technology in Han Dynasty was widely used in Hexi area of Gansu Province. At first there was a single-axis plow (driving two cows), and later there was a double-axis plow (driving one cow). ?

In the Eastern Han Dynasty, sowing technology was introduced into Hexi, making Hexi a rich place in the world. ?

After the founding of the People's Republic of China, the rural areas have just implemented the contract responsibility system of joint production, and there are still few agricultural machinery. Cattle raising is still an important labor force for farmers, and it is still very common in Niu Geng. ? It is still used in local rural areas.