The "Prince of Huainan" refers to Liu An, a prominent figure during the Han Dynasty in ancient China. He was the grandson of Emperor Gao and is best known for his contributions to philosophy, particularly in the development of Daoism. Liu An is credited with compiling the "Huainanzi," a significant text that blends political philosophy, cosmology, and natural science. Liu An ruled the region of Huainan, which is located in present-day Anhui Province. His reign was marked by efforts to promote agricultural development and cultural flourishing. Despite his achievements, he faced political challenges and was eventually forced to commit suicide due to court intrigues.