what achievements/discoveries were there during the period of rule of Liu Bang?

He carried out many good measures to reduce the tax burden on his people. With these policies, people lived a happy and peaceful life then. Besides, Liu Bang ended the tough regulations that were established in the Qin Dynasty to make the society in order. I also heard that he used Confucianism as the main rulling ideology, which helped his throne steadier and supportive.

good answer