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Life expectancy, that thing, is different from predestined critical points.
Whether it was Shang Yaozhi or Di Wu Yue, their lifespans were actually very long to begin with.
It's just that there were breakpoints on their lifelines,
so if they couldn't get over those hurdles, they would die prematurely.
These are the critical points.
By paying a certain price, it's possible to avoid critical points and even extend the lifeline.
Life expectancy, however, has always been unchangeable.
It is determined at birth and doesn't change.
Xize Laurent and the vice principal managed to live up till now because their bodies went through alchemical transformations, stimulating cell division and differentiation to the limits of human capabilities.
But the conditions for body transformation through alchemy are very harsh.
Aside from some alchemical materials that are rare globally, the age of those whose bodies are transformed must be under eighteen.