The Qin Dynasty, which lasted from 221 to 206 BCE, implemented a series of economic measures aimed at centralizing power and standardizing the state. These measures included the standardization of weights and measures, the establishment of a uniform currency, the promotion of agriculture, and the construction of infrastructure. The most significant economic measure was the standardization of weights and measures, which facilitated trade and communication across the vast empire. According to historical records, the Qin government introduced a standardized system of weights and measures, which was crucial for the efficient administration of the empire. This standardization was achieved through the use of bronze standards, which were distributed throughout the empire to ensure uniformity. The introduction of a uniform currency, the Ban Liang, also helped to promote trade and economic stability. The Qin Dynasty also emphasized the importance of agriculture, which was the backbone of the economy. The government provided incentives for farmers, such as land grants and tax relief, to encourage agricultural production. Additionally, the construction of infrastructure, including roads, canals, and fortifications, facilitated trade and communication, further boosting the economy. According to the "Records of the Grand Historian" by Sima Qian, the Qin Dynasty's economic measures were instrumental in the consolidation of power and the establishment of a centralized state. The implementation of these measures laid the foundation for the subsequent Han Dynasty's economic prosperity.