Under the Han, iron and salt were so important that

they became monopolized by the government. Iron was essential for the production of weapons and tools, while salt was an essential ingredient for preserving food and was widely consumed by the population.

During the Han Dynasty in ancient China (206 BCE-220 CE), the government recognized the significance of iron and salt and established state-controlled monopolies on their production and distribution. This allowed the government to regulate the supply, quality, and prices of these goods.

The monopoly on iron under the Han Dynasty led to a state-controlled iron industry, where the government controlled the mining, production, and distribution of iron and iron-based products. This allowed the government to ensure a stable supply of iron for various purposes, including military equipment and infrastructure development.

Similarly, the monopoly on salt involved state control over salt production, distribution, and sales. Salt was a crucial commodity for food preservation, as it helped to prevent spoilage and enhance flavor. The government's control over salt allowed them to collect taxes and regulate its availability to the population. Salt production was closely monitored, and smuggling or unauthorized production could result in severe punishments.

By monopolizing iron and salt, the Han Dynasty government could exert control over these essential resources, regulate their availability, and generate revenue through taxes and sales. This system also helped maintain social order and stability by ensuring a steady supply of these vital goods to the population.