Scam
Lu Zhen looked at the book. He was stunned when he saw that the book had muscular men doing various postures and training.
He looked at the cover of the book.
{Nine Heavens body-refining Art}
When Lu Zhen saw the title, he had a strange expression as he gazed at the sleeping figure of Little Lily.
"If this girl wanted to practise martial arts, she could have asked me," Lu Zhen shook his head. Altough the name sounded like it was a supreme practise which could make you invincible these were actually very common martial arts, which could even be bought in a mortal's market if they were rich enough.
It was a common martial art given to the lowest-ranking servants of the family to make them a little stronger than ordinary people but not too strong that they are out of control.
It basically taught about muscle control and how to increase one's muscles.
Lu Zhen's eyes widened when he thought about the potential effect of the book.