The Ch'in Dynasty, also known as the Qin Dynasty, was established in China in 221 BC and lasted until 206 BC. During this time, the dynasty saw significant cultural and economic advancements, including the construction of the Great Wall of China. There are various synonyms that can be used to refer to this dynasty, including the Qin Dynasty, the Ch'in Dynasty, the Qin Empire, and the Ch'in Empire. These terms all refer to the same period of Chinese history and are used interchangeably by historians and scholars alike. The Ch'in Dynasty was instrumental in shaping the culture and history of China and is considered a significant dynasty in the country's rich history.