Speaking of the Postnatal Five Qi, Zhang Beixing felt his mastery of it was largely due to luck. Had he not, in the beginning, practiced the Northern Sect's Eight Pieces of Brocade incorrectly and thereby accidentally stumbled upon the Three-in-One Resonance method involving qi, blood, and Hidden Force, he estimated he wouldn't have even come close to the Postnatal Five Qi by now. Consequently, stepping into the Transcendent realm so easily would also have been impossible.
Initially, Zhang Beixing had wondered why his Hidden Force was different from others—how it could grow indefinitely. It now seemed that his infinitely growing Hidden Force was actually the embryonic form of the Postnatal Five Qi!
