After Yin Yu read the book, he didn't waste times but practice to sense qi around him, following the method of qi sensing that's written on the book, Yin Yu start to feel that the air around him was full of qi in less than 5 breaths, the feeling of finally able to sense qi makes him happy yet sad at the same times.

It's because although he can sense qi, he can't absorb it right now as he will explode because of excessive qi if he tried to absorb qi.

Still, sensing qi was easier than he expected. Even so, he feels that he may be slower than the rest since he takes almost 5 breathes to be able to sense it, but if other people heard his thought most of them might cough blood and say.

"You only need to sense your first qi within 5 breathes and it's slow!? Most people need more than 10 days and it's already considered fast! yet you sense it under 5 breaths and you say it's slow? If it's slow then which will be considered fast?! "

Imagining people think like that, Yin Yu start to know why most stories start to write it like that, it's mostly so to explain the speed of main character cultivating and to show contempt to others while being modest!.

"It seems that I need to be more modest with my thought in the future"

Standing proudly in an empty room while showing the persona that he's a sage which has abandoned every worldly affair, Yin Yu think that I must be cool right now!.

Soon, he comes back from his act and starts to touch a part of the wall and as expected, a secret path was shown which allowed him to go back.

The secret path was also written on the book and it can be used to return to the forest soon he entered it and teleported away from this place.

***

In the forest Yin Yu in before, there can be seen a woman anxiously searching for someone.

"Little Yu!, where are you!"

This woman is Yin Ying, Yin Yu mother. Before this, she has already tampered with Yin Yu chain-sickle and add a tracking device which will be teleported Yin Yu once he deemed going to die which will end the trial but since yesterday, the signal of her son disappears without any traces which cause this woman to panicked.

Yin Ying started to blame herself for carelessness and because she let Yin Yu take this trial at such a young age.

Truth is, this trial was crueler in the past where they left the child alone until the child clear all the trial. But after the era of peace, this trial has changed it's nature into the trial to teach a child about hardship which will help them in the future.

After seeing Yin Yu determination, Yin Ying and her husband decide to let Yin Yu enter at the same age with the children that enter in the past to help him develop faster like he wishes.

Even so, she has predicted that Yin Yu wouldn't even able to clear the first trial. When Yin Yu clear the first trial, even she couldn't help but feel proud and dejected. Even she can only clear this trial after she's 5 years old and it's her third tries yet Yin Yu clear it on his first try.

The first trial which trains child resoluteness, willpower, determination, bravery, etc. where the child needs to carry the tampered heavy weapon into the dark cold cave then the child needs to keep walking until the end of the cave without letting the weapon on her hands go.

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Of course the weapon weight is going to be decreased over time by the formation inside while walking but most child wouldn't notice it and keep thinking that it's heavy even though it's not that heavy anymore, most would have given up by letting the weapon go but there's also some who's resolute to go without letting go of the weapon.

After Yin Yu arrives at the second trial, even she can't help thinking that Yin Yu will fail this.

The second trial unlike the first require children to learn survival skill, combat skill, etc. without it, most of the child would even be defeated by a mere monkey not to mention boar. Not to mention the hidden poison that let children train their pain tolerance while asking them to hunt a creature that they didn't recognize.

Yin Ying has seen how her own son defeating a boar that she lure for the first time. Although it looks clumsy, considering it's his first fight, she can't help but feel proud of her own son even she can't help to cause mischief to her son when he looks so confident again.

Yes, that's right. The first boar he faced was a boar that she lures after she heard her own son arrogant words, thinking to teach her son a lesson, she lures the boar to Yin Yu location to attack him.

Don't think that his parents never heard of his Chuunibyou antics, in fact, they always eavesdrop Yin Yu whenever they're free because they thought their son is funny with his words and it's only after they heard his declaration that they decide to let him experience some hardship before he harmed himself in the future.

Now, Yin Yu missing makes her heart feels like stabbed by million knives, even so, she didn't give up to search for him and have searched for him in the last place he's on before he disappears.

The only thing she found around that place is burnt deer meat which has turn into ashes, she also found Yin Yu footprints on the floor as seems he's running from something but Yin Yu footprints disappear at the place where the signal lost which make her focus to search that place.  

But not long after her search, the signal of the tracking devices can be felt again which makes her relieved but also worried, even so, she quickly go to his location while watching from afar all so that Yin Yu wouldn't notice him.

After looking, she found out that Yin Yu was fine, which comes to her relief and while looking, she saw the book Yin Yu hold and remember the word her mother say before.

"Inside the trial grounds, there exist an inheritance of the first Matriarch of Yin family, although generation by generation has passed, there's still no one which able to find the Matriarch inheritance."

"Little Ying, if one day you find it, or if one day your daughter find it, then Yin family may rise yet again! But I hope that when the times comes, you will protect it with your life and not let any outsiders get it, do you understand?"

Tears start to flow in her eyes, while her expression shows happiness.

"Can you see mother? your grandson has found the inheritance the Yin family search for so long."

"You have got a good grandson, and of course you've had a great daughter like me who bore a good grandson for you."

After being sentimental for a while Yin Ying cheeky side return to her face again, Yin Ying start to conceal herself once again while watching Yin Yu from afar.