Thanks for the chapter!
So the organs will only last ten years. Simple, in nine and a half years hunt two more apes and transplant their organs for another ten years. Rinse and repeat. MC forgot to mention that since the organs came from apes Gu Da will have a constant craving for bananas, climbing and hanging from high trees, break out in hair all over his body, develop tendency to communicate with grunts, beat his chest, make Tarzan yells while swinging from tree to tree, and the urge to throw his poop at those who irritate him.
After hearing about his nephew the emperor will probably issue a decree stating that nephew is in the wrong, now an ex-nephew, and MC can do anything wants including killing him. That's assuming doesn't head over or send guards over to make sure nephew won't bother anyone else permanently and be offered to the dogs as dinner.