Refers to the period and style associated with the rule of Han emperors in Chang'an, China from 206 BCE to 9 CE. Under the reign of Gaodi from 206-195 BCE, Qin laws and institutions were strengthened creating a strong, unified empire. Tomb models and textual evidence suggest the appearance of several palaces built by Goadi and later emperors, rich in objects such as pottery and with chambers decorated with impressed motifs and painted bricks. Bronze production during this period typically consisted of utilitarian items such as household vessels, which were light in structure, and usually undecorated or decorated with simple incised patterns.——艺术与建筑索引典

So successful was that policy that the Han lasted longer than any other Chinese empire, reigning—with a short interruption when Wang Mangtemporarily usurped the throne and established the Xin dynasty (9–25 CE)—for more than 400 years. Some scholars divide the Han into two sections. The period before Wang Mang’s usurpation—when the capital was in the western Chinese city of Chang’an (now Xi’an, Shaanxiprovince)—is called the Qian (Former), or Xi (Western) Han (206 BCE–25 CE), and the period after Wang Mang—when the capital was moved eastward to Luoyang (in present-day Henan province—is named the Hou (Later), or Dong (Eastern), Han (25–220 CE).——Encyclopedia Britannica  @en