The Qin and Han dynasties were known for the following achievements:
Qin Dynasty:
-Implementation of the Legalist form of Government
-The standardization of the Chinese Language and writing
-The standardization of the currency as a circular copper coin with a square hole in the middle.
-Uniformity of measurements and axle lengths.
-The Building of the Great wall of China to protect against invasions.
-Building of roads and irrigation canals.
-Building of Palace for Xi HuangDi
Han Dynasty:
-Unification of China
-Creation of irrigation and water conservation projects
-Improvements in farming tools
-Expansion of Chinese Borders
-Advances in the world of science, art and literature are made possible
-Invention of Paper
-Establishment of the moral and social basis of Chinese society