Zhaozhou is a renowned Chinese Zen Buddhist monk who lived during the Tang Dynasty (618-907 AD). He is best known for his teachings and the famous koan, "What is the sound of one hand clapping?" His approach emphasized direct experience and the importance of meditation in achieving enlightenment. The Zhaozhou Bridge, also known as the Anji Bridge, is a historic stone arch bridge located in Zhaozhou County, Hebei Province, China. Built during the Sui Dynasty (581-618 AD), it is one of the oldest and most well-preserved bridges in China, showcasing advanced engineering techniques of its time.