Under this dynasty, China made progress in arts and science. The empire also became larger and larger. China started trading with a number of other countries. They started the Silk Road. Merchants used the Silk Road to reach China. During this dynasty Buddhism was introduced in China. Today, the dominant ethnic group of China calls themselves the Han Chinese since this was the dynasty where many of the norms of Chinese culture found a firm foundation in the culture, including Confucianism and Traditional Chinese characters. The first emperor of the han dynasty is Liu Bang, known in Chinese as Emperor Gaozu of Han.