Chinese emperors family tree (early)
Emperor Xian, the last emperor of the Han dynasty, was a descendant of the first emperor Liu Bang. Lasting for over 400 years (the first to last for more than a century), the Han Dynasty is regarded as one of the golden ages of Chinese history. The Han Dynasty was interrupted by the reign of the usurper Wang Mang, who declared the Xin dynasty (9–23 AD); on this basis, the Han Dynasty is generally divided into the Western Han (206 BC – 9 AD and 23–25 AD) and the Eastern Han (25–220 AD). The rulers of the Shu Han, one of the three successor states to the Han Dynasty during the Three Kingdoms period, were descended from the Han imperial family, and considered themselves a continuation of the Han Dynasty; they are included below.
Government of the Han dynasty
The Han system of imperial government borrowed many of its core features from the regime established by the Qin dynasty. For example, Gaozu's Chancellor Xiao He (d. 193 BC) integrated much of the statutes of the Qin law code into the newly compiled Han law code. Yet Gaozu's establishment of central control over only a third of the empire—the other two-thirds of territory was controlled by semi-autonomous kingdoms—strayed from Qin's imperial model which gave the emperor direct control over all of China. However, a series of reforms eventually stripped away any vestiges of the kingdoms' independence. Han emperors thereafter enjoyed full and direct control over China, as had the first Qin emperor. The Han court's gradual move towards reestablishing central control can also be seen in its monetary policy. While the Qin regime installed a nationwide standard currency, the early Western Han regime oscillated between abolishing and legalizing private mints, commandery-level mints, and kingdom-level mints issuing various coins. In 113 BC the Han court finally established the central government's monopoly control over the issuance of a standard, nationwide currency.