Generally, those who continue to cultivate have powerful beings providing them with resources, but after a thousand years, if one wishes to continue cultivating, even a Divine Transformation Expert would be unable to afford the necessary resources.
All the Spiritual Energy combined from the entire Lower Realms is just enough to prevent a thousand-year Tianyuan fruit from withering.
A ten-thousand-year Tianyuan fruit cannot be cultivated through simple nurturing.
According to the records in the Middle Realms, there was only one appearance of a Tianyuan fruit eight thousand years ago, and the one before that is too ancient to trace.
Chu Ning was able to obtain a ten-thousand-year Tianyuan fruit, and Tang Ruowei felt happy for Chu Ning, as this meant that Chu Ning no longer had to worry about longevity.
With an extended lifespan of three thousand years, and a total lifespan of over four thousand years, this was already comparable to that of an average Divine Transformation Expert.