1: The earliest recorded ruling dynasty of China, they were known for their advances in math, astronomy, artwork and military technology.
2: The second imperial dynasty of China. Though tainted by deadly dramas within the royal court, it is also known for its promotion of Confucianism as the state religion and opening the Silk Road trade route to Europe, permanently altering the course of Chinese history.
3: This Dynasty was the final imperial dynasty in China. It was an era noted for its initial prosperity and tumultuous final years, and for being only the second time that China was not ruled by the Han people.
"1 2 3" Do not have commas.