The goddess training regimen

There was a brief moment of awkwardness when he returned to the room later on, but eventually they broke the ice and she began to speak about what she found out.

She explained how she had a particular constitution that would make it very hard to intake external energy, even harder to make it his own, but once he did and his body adapted then it'd be very hard to damage his cultivation and he'd be quick to return to full power even when he did use his energy reserves. The harder it was to take in the energy, the more sturdy his later cultivation would be and the quicker the energy self-replenishment.

It was a rare kind of constitution with good pros to it, but the cons were too hard to counter and so it wasn't considered to be a good one to have.
The gimmick about the harsher the cons were the better the pro too didn't make it any better, as the harsher the cons the harder it'd be to counter them and therefore what would be the use of those good pros if one couldn't get to them?

As for Ren's case... it looks like he got it as bad as it came, possibly one of the worsest case in history.
Even cultivating for so many years didn't help him store even a single drop of energy!
His meridians not being in the best state too didn't help his case.

The more she talked the more dejected he got.

So there was no solution after all.

But Mei thought otherwise.
While his case was quite bad... her sect's knowledge and techniques were nothing to sneeze at.
She knew some massages that'd help him smooth his meridian and unclog some obstructed veins which should help in easing the energy in, and if all else should fail...
Mei was obviously thinking with her pussy, but now that everything was lost would it really be so bad to find a partner she liked and live along him? Moreover her cultivation would become that much smoother with a partner, a partner she got an huge and still growing crush on, and maybe her damaged cultivation could be mended enough to not lose any energy she gained back when using it.

Indeed, she noticed while checking Ren, the energy she used to check his body didn't even start replenishing on its own.
Usually cultivating would increase the cap for how much energy one could freely use, and then after using said energy it'd get replenished on its own even if left alone.
Mei's cultivation on the other hand was damaged enough to lose her self-replenishing function... any energy she'd use would be gone for good, which meant she'd have to use it sparingly least she didn't have enough when it mattered.

Well, she did have a secret technique that'd let her overdraw her energy even if she had none of her own... but it came with side effects, namely it'd make her go in heat and she didn't want to end up in a state where she could be easily seduced by anyone.

"...and so it's not like there's absolutely no way. From now on during the day i'll oversee your training, and during the night i'll help you unlock your potential through some secret techniques passed down in my family!" she still didn't intent to sleep with him, there should still be some consideration about that, but unlocking his talent would be absolutely no problem!

Though by the way she said that, it was inevitable for him to think of what kind of secret techniques would be used during the night!

He found out soon enough.

Once again she asked him to strip down, and this time to lay down on the bed as she straddled him and began to weave her energy in her fingers before starting to poke strategic points on his back.

[Mei's Qi decreased by 5]

Some felt good, some hurt like hell, but he endured through it all and an hour later left her to rest while he left the hut, moving to his master's and borrowing the latter's bed to sleep as he had done this whole time.