Romans_Revenge:
Do we actually know of Jing’s age? I only remember XY saying he’s older than her,when he teased calling her sister lol.
I don't recall his specific age being mentioned in the novel. XL mentions that he and TSJ did business together for hundreds of years before either of them met XY. That suggests that TSJ was already out doing business on behalf of the clan at least 200 years before TSH tortured him.
XY and CX were separated for 300 years. XY spent the first 70 years on Jade Mountain and then 30 years as the nine-tailed fox's captive. And in the drama she still had the appearance of a child when she escaped from the nine-tailed fox 200 years before meeting TSJ.
Assuming that TSJ began doing business on behalf of the clan at an age where he didn't look like a child, TSJ is probably at least a few decades older than XY, if not a few centuries.
In chapter 23 (after XY's 37 years of healing, at least four years of learning archery, and more than six years of living with TSJ in QS town) XY speculated that XL was "just a young man" when he escaped from the slave match arena "five or six hundred years ago". And she noted that she hadn't even been born at that time. So she was definitely less than 500 years old (but also definitely much older than 350 years old) at that point. So when she met TSJ ~50 years earlier, she was probably somewhere between 400 and 450 years old.