The han dynasty is one of the most significant dynasties in the history of China and it attained lots of remarkable achievements during the reign. The han dynasty is the first in opening its door to other cultures, with the foreign trade prosperous. The Silk Road exploited in han dynasty lead to the central and west part of Asia, even Rome. The schools of art also present a state of flourish, springing up lots of monumental works in literature, history and philosophy. The first dictionary in China was compiled and finished in 100 A.D., which not only contains nine thousand Chinese characters, but also offers paraphrases and examples of different writing skills. Science and technology also made much progress during this period. People invented water clock, sundials and the instruments that can predict the earthquake. The han dynasty witnessed four hundred years and went to doom because of governors’ decadent.