Humans begin their cultivation journey from the mortal realm, refining their flesh and blood, honing their bones and sinews, tempering their skin.,“Young master, the deputy sect leader just sent someone to say that if you are free, please go to his place. He has something important to discuss with you,” Zhang Chongtian said respectfully.,Before the age of fifteen, the meridians and internal organs in a human body are not yet fully formed, making them more vulnerable and less suitable for cultivation.。