The Han Dynasty, which was known for its innovation and cultural advancements, dominated Chinese history for over four centuries. Some common synonyms for the Han Dynasty include the Great Han Empire, the Han Empire, or simply Han. Other synonyms that may be used to refer to this period in Chinese history include the Han era, the Han period, or the Han age. It is also sometimes referred to as the Eastern Han Dynasty, to differentiate it from the earlier Western Han Dynasty. One may also use the term Han China to refer to the time period when the Han Dynasty was in power.