Given the Chinese calculation of ages , he thus could have been born anytime from 661 to 670 .
Jump up ^ However , Xiao was described to be in his 80s when he died in 749 .
Given the Chinese calculation of ages , Xiao thus could have been born anytime from 661 to 670 .
Jump up ^ However , Xiao was described to be in his 80s when he died in 749 .