At birth, every human infant will be tested for their Spiritual Root Aptitude and special physique.
Any human with even a bit of aptitude will be chosen for cultivation.
Basically, there is no chance of hidden talent being overlooked.
Because of this, over just a million years, the Xuanhuang Sect has selected a large number of geniuses.
These geniuses have also been sent into the inner world of Jianmu for training.
Since Jianmu's inner world contains a sixth stage Immortal Vein, staying inside it is almost no different from cultivating in the Immortal World, and the training efficiency naturally surpasses that of cultivators elsewhere.
So over time, the population of Jianmu's inner world has exceeded a trillion.
"A trillion humans?"
"No wonder three hundred million True Immortals were born."
"With this training efficiency, the future could see far more than three hundred million True Immortals."
