Ning stayed around the sun for so long that he lost track of all time. Most of the time, he wasn't even awake at all. The times he was awake, he asked the system how long had passed and then went right back to sleeping again.
He went back and forth between being awake and sleeping for so long that even worlds would've had enough time to change altogether.
In the meantime, his body improved continuously until so many years before he finally woke up one day and decided to stop.
"How many years have passed?" Ning asked the system.
<245,353 years have passed.>
Ning wasn't even surprised when he heard that. He was surprised the first time he heard 10 thousand years had passed, and maybe once when he heard 100 thousand years had passed, but after that, he just let it be.
After all, he had to spend roughly 500 thousand years at the minimum before he could leave this place.