If the first time occurs during the formation of the core between both parties, there's a non-negligible chance that the level of the core could be elevated,
However, this secret skill requires a high level of dedication from the male cultivator who isn't the precious body. His mana attribute must ideally be ice, and cultivation level and martial method should not be inferior to the Chilling Essence mana,
Otherwise, this could no longer be called dual cultivation, but rather extraction and replenishment.
Liu Emei only skimmed through the latter secret skills she was seeing, her ears turning red,
"This is so shameful, that position is so perverse..."
"Brother Chen just cultivates the ordinary Turtle Breathing Technique right? Is his mana level enough?"
In the end, Liu Emei was somewhat worried about Chen Yi's mana and felt he wouldn't be able to meet the requirements for dual cultivation during Core Formation,
So she did not study it too deeply.