HAN DYNASTY: One of the most important dynasties in Chinese history, the Han dynasty (202 B.C.-220 A.D.) made an impact that is still felt in CHINA today; ethnic Chinese refer to themselves as the Han people in reverence to the dynasty. The Han dynasty ruled CHINA for over four hundred years, except for a brief period between 9 and 23 A.D. when Wang Mang usurped the throne and established the Hsin Dynasty. In contrast with the Han, this short-lived dynasty ruled over what is considered to be one of CHINA's blackest periods. The period of the Han dynasty is, therefore divided by historians into two distinct periods: the Early Han, covering the period before Wang Mang, and the Later Han, which ruled from after Wang Mang until 220 A.D. The Han dynasty rose as a result of popular discontent with the Ch'in dynasty and its policies. The dynasty's founder, Liu Pang, was originally a farmer, who took part in the insurrection against Ch'in. He then established a centralized government in Ch'ang-an and adopted the royal name Han Kuo-tse. He was a competent monarch who followed the advice of one of his officials: "An empire can be conquered from the back of a horse, but it cannot be ruled from the back of a horse." Han Kuo-tse established many precedents in Chinese history. He was the first emperor to give the initiative in making policy to his advisers and he himself would make no decisions without first consulting these advisers. Another Han emperor, Wu (reigned 141-87 B.C.), is often considered to be the greatest emperor in Chinese history. He centralized all government powers in Ch'ang-an, established the bureaucracy, promoted literacy, expanded CHINA's borders into Central and Southeast Asia, promoted diplomatic and trade ties with the West, modernized CHINA's penal code, and enacted economic reforms regulating the influence of the middle class. After his death, few Han emperors were able to match his achievements and commitment, and the dynasty fell into decay, culminating in the usurpation of the throne by Wang Mang in 9 A.D. Wang Mang nationalized land and reenacted many of the Ch'in dynasty policies abolished by the early Han emperors. Nevertheless, it seemed that even nature opposed him. In 11 A.D. the Yellow river changed course, killing millions and sparking rebellions in northern CHINA. In 23 A.D. Wang Mang was deposed and two years later Liu Hsiu, a member of the Han dynastic family, entered Ch'ang-an and reinstated the Han dynasty. Liu Hsiu and his descendants were able to restore much of the imperial glory of the Early Han dynasty. However, about one hundred years after Liu Hsiu's death, the court eunuchs began amassing power and privileges. In 190 Szechuan seceded and contact with Central Asia was lost. By 220 CHINA had split into three kingdoms: Wu, Wei, and Shuhan. In the four hundred years of Han rule, Chinese culture flourished. Most scholars believe that the five Chinese classics - the Book of History ("Shu Ching"), the Spring and Autumn Annals ("Ch'un Ch'iu"), the Book of Songs ("Shih Ching"), the Book of Rites ("Li Chi"), and the Book of Changes ("I Ching") - were written during this period. CONFUCIANISM was established as the state religion, and BUDDHISM was first introduced from INDIA. (See also China article).