 In the later part of the 6th century, Emperor Wen of the Sui dynasty ended the strife and division of China, and re-unified the country.The Sui dynasty collected the music and dance of the various peoples under its rule as well as popular music from outside China into the "Seven Books of Music" (七部樂), describing the music and dance of the Western Liang, Korea, India, Bukhara, Kucha, the "Qingshang" and the "Wenkang" (文康, a masked dance, later known as "Libi", 禮畢).Later in the Sui dynasty, the music and dance of Shule and Samarkand were added to form the "Nine Books of Music", further expanded into ten during the reign of Emperor Taizong in the Tang dynasty, when "Yanyue" (燕樂, banquet music) and the music of Gaochang was added but "Wenkang" dropped.