In the days that followed, Hinata spent the day exercising her physical skills in the ninja school.

In order to allow his body to get closer to the limit and adapt to the limit, he almost always maintains the state of opening the door and closing the door when exercising.

If Kai knew about this way of exercising, Kai would definitely be dumbfounded.

Because even if 'open the door' and 'close the door' are only the first two doors in the 'Eight Doors Dunjia', the burden on the body is also very large, and there is no problem with opening it in a short time, but if it is maintained for a long time, it is not something that ordinary people can do, this is not a matter of hard work, but the body of ordinary people can not endure such consumption.

Of course, the Hyuga Mirror with the Reincarnation Eye is not an ordinary person, so although this exercise method is crazy, it can barely grit his teeth and stick to it.

And this kind of almost inhuman penance has a very obvious effect.

On the afternoon of the fifth day of penance, Hyuga Mirror successfully opened the third gate of the 'Eight Gate Dunjia', which is located in the throat, a day and a half earlier than expected.

However, when Hinata Kagami finds Kai and asks Kai about the opening technique of the fourth 'Wounded Gate', Kai tells him that Kakashi has also come to inquire in the morning.

"It's half a day faster than me!"

After learning that Kakashi had also come to ask, Hinata Kagami was taken aback.

In order to master the 'Eight Gate Dunjia' as soon as possible, his cultivation can be described as 'crazy' these days, but even so, he is still half a day behind Kakashi, which shows how desperately Kakashi has become.

Kai sighed with emotion: "It took me three years to open the 'door of life', and you two guys mastered it in less than a week, compared to you, I am simply an idiot." ”

Hinata shook her head: "It can't be counted like this, you also included basic training in those three years, and Kakashi and I were also exercising at that time?" If you have the current foundation, if you learn the 'Eight Doors Dunjia' at this time, the speed of opening the door will not be much slower than ours!" ”

Kai showed a row of white teeth and smiled, "You don't need to comfort me, it's a very interesting thing to challenge you geniuses, and I'm enjoying it!" ”

Hinata also knew that Kai was a resolute guy, so he didn't say anything more, and asked about the skills and precautions for opening the fourth door 'Hurt Door' before leaving.

When I returned home at night, Hinata Mirror came to the bedroom, closed the doors and windows, and took out a storage scroll from the ninja bag he carried, and then took things out of the storage scroll.

These things contain meridian diagrams of the human body, materials on sealing techniques, and a lot of unfinished manuscript papers.

The time of the Hyuga mirror during the day belonged to the 'Eight Gate Dunjia', and at night, when he returned home, he began to study the improvement of the 'Yin Seal'.

In the end, the fire escape clone was also taken out of the storage scroll, and after placing it on the side, the Hyuga mirror compared the meridian diagram of the human body, while studying the fire escape clone, and revised and changed it in the draft.

If he encounters difficulties, he will use the 'Soul Descent Technique' of the Reincarnation Eye to let the spirit body enter the fire escape clone, and manipulate the fire escape clone to feel the trajectory of Chakra in the body when the 'Yin Seal' is activated, compare the meridian diagram of the man in front of him, find out the subtle differences, and then mark them one by one.

It is not an easy task to improve the very perfect secret technique of the 'Yin Seal'.

Fortunately, the Hyuga Mirror has a fire escape clone that has successfully mastered the 'Yin Seal' as a reference, plus his requirements are not high, he just wants men to successfully cultivate the 'Yin Seal' and obtain the supernatural effect of the 'Yin Seal' that accumulates chakra, so under the target, the improvement is not completely clueless.

And after these five or six days of contemplation, Hinata Mirror already had a preliminary plan in his mind.

According to the trajectory of Chakra when the Fire Escape clone activated the 'Yin Seal', after comparing it with the male meridian diagram one by one, he found that there were more than a dozen subtle differences between the two.

It is precisely these dozen or so subtle differences that cause male ninjas to be unable to successfully cultivate the 'Yin Seal'.

According to the normal improvement routine, the helioscope needs to conduct a comprehensive analysis of these more than a dozen subtle differences one by one, as well as various verification tests for the design matching.

But the meridians of the human body are extremely wonderful, and any small differences are enough to make people study repeatedly, so the helioscope has no energy and time to analyze these more than a dozen subtle differences one by one.

If you want to change someone else, you will be helpless at this time.

But Hinata is different, he has one of the best biological cloning technologies in the current ninja world in his hands, so he has come up with a very simple solution, which is trial and error elimination!

To put it simply, it is to use more than a dozen clones to try and make mistakes one by one, anyway, it is the clones that are controlled, so there is no need to worry about the irreversible damage to the body's meridians after trial and error.

And through this method, you can quickly find out which of these dozen or so subtle differences, or which differences have created obstacles for men to cultivate the 'Yin Seal'.

As long as these obstacles are accurately found, it is only a matter of time before they are solved one by one with the sealing technique of the helioscope.

In these days when Hinata Mirror is cultivating hard day and night, it is not peaceful in the ninja world.

As Hyuga expected, the riot that broke out in Yunyin Village soon spread throughout the ninja world, and its speed of transmission exceeded even Hyuga Mirror's expectations.

And with the spread of the commotion in Yunyin Village, some true and false news also spread in the ninja world.

One of the pieces of news that caught the attention of the Hyuga Mirror was that there were rumors that there was a big problem with the group hiding in the ritual, although they successfully obtained a variety of 'blood inheritance limits', but the most critical spirit body had a problem, and there were many souls in the body who could compete with his own deity for control of the body.

At first, Hinata thought that the news had spread from Yunyin's side.

But if you think about it carefully, such important information, Yun Yin will never leak it easily, you must know that Yun Yin is still blocking the truth about the riots in Yun Yin Village, and blocking the news that they have a connection with the Konoha rebel ninja group, so it is unlikely that this information will flow from Yun Yin.

"Could it be Orochimaru?"

Now that everyone knows this information, in addition to Yun Yin and Hyuga Mirror, there is only the Great Snake Pill who was also present at the time, if it weren't for Yun Yin, then nine times out of ten it would be the Great Snake Pill.

"But Orochimaru doesn't have this motive! And if it's not Orochimaru, then who will it be? ”

Suddenly, Hinata thought of someone, someone who also knew the news...