It would take about ten days to half a month to recover.
But relatively speaking, it still consumes a lot of mana and vital energy.
Because the Yin Yang Energies are not an endless source, they also require consumption of one's own resources to replenish.
Moreover, to be safe and to avoid Nangong Mili seeking revenge after waking up from his treatment,
Lu Changsheng still needed to maintain his condition as much as possible.
Otherwise, after working tirelessly day and night, if he was in a weakened state and then Nangong Mili woke up and attacked him, wouldn't it be embarrassing?
However, he had promised Meng Xiaochan to save a life.
Having gained enough benefits himself, Lu Changsheng naturally would fulfill his duty to save that person.
After meditating to recuperate, chatting intimately with Ling Zixiao and Meng Xiaochan to foster feelings, Lu Changsheng continued healing and saving the person.