What did Han emperors do to keep the economy stable?

The Han Dynasty, which existed from 206 BCE to 220 CE, was one of China's most prosperous and influential periods. The emperors of the Han Dynasty implemented a variety of measures to keep the economy stable and thriving. Here are some of the economic policies and initiatives they used:

1. **Agricultural Development**: The Han emperors realized that a stable agriculture was the backbone of the economy. They supported agricultural productivity by promoting the development of irrigation systems, reducing taxes on farmers during difficult times, and distributing land to peasants under certain programs. Emperor Wu of Han (or Wu Di) is known for implementing policies that reinforced the importance of agriculture.

2. **State Monopolies**: The government established monopolies on certain key goods, such as iron, salt, and alcohol. This not only provided a significant source of revenue for the state but also helped to control prices and supply. The government also monopolized the minting of coinage to standardize the currency and facilitate trade.

3. **Trade and Commerce**: The Han Dynasty is known for opening the Silk Road, which expanded trade routes to Central Asia, the Middle East, and even to the empires of Rome and India. This not only brought wealth but also cultural exchanges. They also regulated markets and standardize measurements, which facilitated domestic trade.

4. **Currency and Taxation**: The Han government standardized coinage to encourage circulation and trade. They also had various forms of taxation including a land tax, a poll tax, and labor service. Taxes were often paid in kind, which the state would then use or redistribute.

5. **Corvee Labor and Military Colonies**: The state employed corvee labor to build and maintain infrastructure such as roads, canals, and palaces, which benefited trade and agriculture. Some military colonies were also established, where soldiers farmed and provided their own sustenance, reducing the burden on state granaries.

6. **Storehouses and Relief Measures**: The Han Dynasty established a system of granaries and warehouses to store surplus grain to be used during times of famine or disaster, which helped in stabilizing food prices and securing food supplies.

7. **Legalism and Confucianism**: The Han emperors also drew on Legalist ideas to maintain a centralized bureaucracy that governed economics and trade while incorporating Confucian principles to instill a sense of duty and ethical governance in their officials.

The combination of direct state involvement in key economic sectors, a structured bureaucracy, encouragement of agriculture, a standardized currency, and the development of infrastructure for trade helped the Han Dynasty to achieve economic stability and prosperity. However, fiscal problems did arise towards the end of the dynasty, contributed by corruption, over-extension of resources, land concentration by powerful elites, and natural disasters, eventually leading to the decline of the Han Dynasty.