What does Nascent Soul mean in cultivation novels?

In cultivation novels, the Nascent Soul stage was the highest stage a cultivator could reach, also known as the infant stage or the naive stage. In cultivation novels, the Nascent Soul was one of the signs that a cultivator had reached the realm of ascension. They could leave the mortal world and enter the immortal world or the devil world. The strength of a Yuanying cultivator would be very powerful. They could display all kinds of magical abilities and even connect with heaven and earth to obtain the power of immortals. However, Yuanying cultivation also required a lot of effort and time, and often required strong guidance and help, otherwise it would be very difficult to succeed.