1) Chinese civilization began along the Huang He and Chang Jiang rivers with the Shang dynasty, where early achievements included the development of writing.
2) The Qin dynasty unified China under the Legalist philosophy of the Qin Shi Huang and standardized policies, while the Han dynasty adopted Confucianism and expanded China through trade along the Silk Road.
3) Contact with other cultures through trade introduced Buddhism to China, which gained widespread popularity.