Su Song was the engineer of a water-drivenastronomicalclock tower in medieval Kaifeng, which employed the use of an early escapement mechanism. The escapement mechanism of Su's clock tower had previously been invented by BuddhistmonkYi Xing and government official Liang Lingzan in 725 AD to operate a water-powered armillary sphere, although Su's armillary sphere was the first to be provided with a mechanical clock drive. Su's clock tower also featured the oldest known endless power-transmitting chain drive, called the tian ti (天梯), or "celestial ladder", as depicted in his horological treatise. The clock tower had 133 different clock jacks to indicate and sound the hours. Su Song's treatise about the clock tower, Xinyi Xiangfayao (新 儀 . 象 法 要), has survived since its written form in 1092 and official printed publication in 1094. The book has been analyzed by many historians, such as Joseph Needham. However, the clock itself was dismantled by the invading Jurchen army in AD 1127, and although attempts were made to reassemble the clock tower, it was never successfully reinstated. (read more...)
Du Fu (Chinese: 杜甫; pinyin: Dù Fǔ; Wade–Giles: Tu Fu, 712–770) was a prominent Chinese poet of the Tang Dynasty. Along with Li Bai (Li Po), he is frequently called the greatest of the Chinese poets. His own greatest ambition was to help his country by becoming a successful civil servant, but he proved unable to make the necessary accommodations. His life, like the whole country, was devastated by the An Lushan Rebellion of 755, and the last 15 years of his life were a time of almost constant unrest.
Zhou Tong (Chinese: 周同 and 周侗; pinyin: Zhōu Tóng; d. late 1121 CE) was the archery teacher and second military arts tutor of famous Song dynasty general Yue Fei. Originally a local hero from Henan, he was hired to continue Yue Fei's military training in archery after the boy had rapidly mastered spearplay under his first teacher. In addition to the future general, Zhou accepted other children from Yue's village as archery pupils. During his tutelage, Zhou taught the children all of his skills and even rewarded Yue with his two favorite bows because he was his best pupil. After Zhou's death, Yue would regularly visit his tomb and perform unorthodox sacrifices that far surpassed that done for even beloved tutors. Yue later taught what he had learned from Zhou to his soldiers and they were successful in battle.