Lü Cai

Lü Cai was a Chinese musician of early Tang period. He was versed in melody and choreography, and was expert at playing the guqin. In 629, Emperor Taizong ordered Zu Xiaosun to set down the temperament of music renewedly, Zu argued with Wang Changtong and Bai Mingda, and could not solve it. So Taizong ordered his officers to search for the able men, the zhongshuling Wen Yanbo recommended Lü Cai. In 631, Lü wrote Music of Victory for Taizong's poem. In 632, he helped Taizong to train 120 musicians to perform Music of King Qin Breaking up the Enemy's Front. Apart from music, Lü was also versed in alchemy, astronomy, maths, history and geography.
In 655 Lü Cai, in his role as Chief Steward of the Palace Medical Service denounced the translator Xuanzang which led to a public debate between the two men. Lü Cai lost and was forced to issue a public apology.