What are some major accompishments in the Han Dynasty?

On education, the Confucianism got its foundation. It combined the education, exams with the official career at that time.
On literature, the most famous book 'Records of the Grand Historian' Shiji in Chinese was form at that time.
On technology, papermaking technology was invented. Porcelain came into being also. It is also the first time, ambassadors were sent to other countries, which led to the Silk Road.