Emperor Wen of Sui, born Yang Jian, was the founder of the Sui Dynasty in China, reigning from 581 to 604 AD. He is known for unifying China after several centuries of division during the Southern and Northern Dynasties. His rule marked the end of the chaotic period and laid the foundation for the subsequent Tang Dynasty. Emperor Wen implemented significant reforms, including the establishment of a centralized government and the promotion of agriculture. He also initiated large-scale construction projects, such as the Grand Canal, which improved trade and communication across the empire. His reign is often remembered for its efforts to restore stability and prosperity.