楊堅
Zu Xiaosun () was a Chinese musician of the Sui and Tang dynasties. During the Kaihuang reign period (581–600) of Emperor Wen of Sui he was appointed as "Xielülang" (协律郎), joined the melodizing of ritual music, and received orders to learn the Jing Fang Temperament (京房律法) from Mao Shuang (毛爽). After the founding of Tang Dynasty, Zu served as "zhuzuolang" (著作郎), "libulang" (吏部郎) and "taichang shaoqing" (太常少卿).