Although his daughter Lu Linghe doesn't have much talent in music mastery, she does have considerable talent in body refinement.
Back then, because the Hundred Refinements Treasure Body Art was too complex and dangerous, watching Lu Linghe condense magical treasures made Lu Changsheng's heart leap, and he eventually gave up, giving her a book of exquisite-level body refining techniques instead.
To his surprise, after teaching his daughter during these days, Lu Changsheng found the "Vajra Ming King Technique" very suitable for her.
Or rather, this Buddhist body refining technique emphasizes a mind as pure as a Bodhi tree, unsullied by dust, making it extraordinarily fitting for Lu Linghe.
Though Buddhist techniques sound somewhat peculiar, his daughter cultivates them with ease, and her father watches in peace, so Lu Changsheng pays no mind.