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.
Lu Wan
In the winter of 202 BC, after Liu Bang defeated Xiang Yu at the Battle of Gaixia, he ordered Lu Wan and Liu Jia (劉賈) to lead troops to attack Gong Wei, the King of Linjiang (臨江王). They defeated Gong Wei, conquered Linjiang, and returned by the seventh month of that year. Lu Wan later followed Liu Bang to attack Zang Tu, the King of Yan (燕王), who was defeated. By then, Liu Bang had unified most – if not all – of the Eighteen Kingdoms under his control and established the Han Empire with himself as its first ruler; he is historically known as "Emperor Gao" (or Emperor Gaozu) of the Han dynasty. Although he had already awarded vassal king titles to seven men who were not from the Liu clan, he wanted to make Lu Wan a vassal king as well so he sought his subjects' opinions. They were aware of the emperor's intention, so they nominated Lu Wan on the grounds that he had made great contributions in the military campaigns against the rival kingdoms. In the eighth month of 202, Lu Wan was formally enfeoffed as the "King of Yan".