Cai Yong: A Polymath of the Han Dynasty Cai Yong (133–192), courtesy name Bojie, stands as a singular figure in Chinese history—a testament to intellectual breadth and artistic accomplishment during the Eastern Han dynasty. More than just an astronomer or calligrapher, he embodied the ideal Confucian scholar of his time, seamlessly blending disciplines into a holistic worldview that profoundly impacted subsequent generations of thinke…