During the Zhou dynasty, one of the important inventions was the crossbow. Iron was one of the major sources that the Zhou used to make weapons.
To increase the portion of crops and plants the Zhou used iron tools, irrigation, and fertilizers. These innovations helped in more efficient use of the land. According to the Zhou dynasty, soybean was their major crop.
In the course of the Zhou dynasty, coins were used for the first time. The usage of coins made trade across the empire easier. They also had a uniform currency which made trade much easier.
Through the time of the Zhou dynasty, the network of roads was built, which helped in trade and travel. With this innovation, people could travel everywhere with less time.