480,000 plus years of cultivation.
It seems like a lot, and indeed, it really is a lot.
With such astronomical numbers of cultivation years, he could accomplish many things.
Of course, the displayed cultivation years here is the total of all cultivation years accumulated, including the part that reflected back from his descendants. Although that portion didn't leave much after being consumed.
Han Li's goal was to advance from the Quasi Emperor Sixth Heaven to the peak of the Heaven Imperial Realm in one go, which required a tremendous amount of cultivation years, and he was still somewhat short of the necessary amount.
This was still because he possessed Immortal Grade second-class talent, which greatly reduced the cultivation years consumed to elevate his realm.