An earlier form of music notation from the Tang era survives in just one manuscript , dated to the seventh century CE , called `` Jieshi Diao Youlan '' ( `` Solitary Orchid in Stone Tablet Mode '' ) .
An earlier form of music notation from the Tang era survives in just one manuscript , dated to the 7th century CE , called `` Jieshi Diao : You Lan '' 碣石調幽蘭 ( Solitary Orchid , in Stone Tablet Mode ) .