As Wang We held the life span in his hand, he frowned as he sensed something was odd. So, he quickly divined the problem and learned that each of his incarnations couldn't live 1 Yuan Epoch.
1 Yuan Epoch was the limit of mortals, and since his incarnations are part of his [Existence], their lifespan is his lifespan. If one lived for 1 Yuan Epoch, the main body would run out of lifespan.
In other words, he cannot use them to escape this restriction of Heaven and Earth. Wang Wei was sure there was a way to remove that limit, but this method may not exist in the Lower Dimension.
'It does not matter. I can still use the lifespan to boost the incarnation's comprehension.' Using lifespan this way requires a deep understanding and control of the soul, so most cannot do this, but he could.