The term "Emperor Han" refers to the rulers of the Han Dynasty, one of the most significant dynasties in Chinese history, which lasted from 206 BCE to 220 CE. The dynasty is known for its advancements in technology, culture, and trade, including the establishment of the Silk Road, which facilitated commerce between China and the West. The Han Dynasty is often divided into two periods: the Western Han (206 BCE - 9 CE) and the Eastern Han (25 CE - 220 CE). Notable emperors include Emperor Wu, who expanded the empire and promoted Confucianism, and Emperor Guangwu, who restored the dynasty after a brief interruption.