'Zhuang Chenggan' was explaining a secret technique to replace demonic transformation to Song Hengjiang.
Of course, there was a problem with the technique. Once someone became demonic, it was essentially an irreversible change. A demon was no longer human; at least, he didn't know of any way to reverse the transformation. He himself had never decided to undergo the demonic transformation in place of Song Wanxi, even though she was indeed the woman he loved most in his life.
After all, he loved himself the most.
But in order to deceive Song Hengjiang, the secret technique couldn't have any obvious issues.
So Zhuang Chenggan chose to hide the problem in a part that Song Hengjiang couldn't verify, which was after the replacement transformation into a demon.
Compared to the 'True Demon Secret Technique' he prepared for Jiang Wang, he had made very fine adjustments.
