Emperor Xizong of Tang
Xiao Qing was born in 862, during the reign of Emperor Yizong of Tang. His family was from Wannian (), one of the two counties making up the Tang Dynasty capital Chang'an. His line was a prominent one — having produced a number of chancellors and other important officials, including his grandfather Xiao Fang, who served as a chancellor during the reign of Emperor Xizong of Tang. His father Xiao Lin () served as the mayor of Jingzhao Municipality (京兆, i.e., the Chang'an area). Xiao Qing himself was said to be intelligent and capable in literary matters.