That said, the competition here is fierce beyond outsiders' imagination!

Those local tyrants form false alliances with each other, secretly spy on each other, and once they seize the opportunity, they will deal ruthless blows to their opponents...... And these two bloody mountains full of cruelty and cunning gradually evolved into the base camp for the development of ninjutsu. Pen & Fun & Pavilion www.biquge.info

The greatest contribution of Iga and Koga to the cause of ninja is the systematization of the theoretical foundation and skills of ninjutsu.

In the 4th year of Enpo (1676) in the Tokugawa Ietsuna period, the fourth shogun of the Tokugawa family, Fujibayashi Hotake, a hermit of Koga, combined the ideas and martial arts of famous Japanese and other foreign generals to write the ultimate ninja training guide that integrates ninjutsu, ninjutsu, and ninja weapons with reference to the contents of the writings of that country and other countries. And named the book "Wanchuan Jihai".

As the title of the book indicates, "Ten Thousand Rivers and the Sea" means that the sea embraces all rivers and takes the essence of each genre.

"Wanchuan Jihai" is composed of six parts: righteousness, knowledge, yin forbearance, yang forbearance, heavenly time, and ninja weapons. This book became a required reading material for ninja training in later years.

"Liutao" and "The Art of War" are two ancient works that have a deep impact on the overall development of "Wanchuan Jihai" and ninjutsu, which can also be seen that these ancient Chinese military martial arts ideas have laid a substantial theoretical foundation for the development and growth of Japanese ninjutsu in the future, which is the earliest proof that ninjutsu did originate from China, and it can be said that "Wanchuan Jihai" is a summary of the Japanese after learning the essence of ancient Chinese military and the cultivation of esoteric metaphysics.

Therefore, although the genres are different, the classics practiced by ninjas are all the books "Wanchuan Jihai", and the content of this book is to teach ninjas all the theoretical foundations and skill guidance on how to perform ninjutsu......

......

"So, this ninja organization is different from other mysterious organizations. Many mystical organizations and mystical professions will automatically retire from the stage of history as history develops, because their core will be a certain faith or spirit. Ninjas, on the other hand, are distinguished by the number of martial arts paths. In a sense, anyone who has cultivated this legendary book "Ten Thousand Rivers and Seas" can become a ninja......" Chen Fei said thoughtfully.

"Oh...... That is to say, if this "Ten Thousand Rivers and Seas" is preserved, then it means that the mysterious profession of ninja has also been handed down......" Lao Zhang said suddenly.

"That's right, the book is there, and the people are ......," Wansan said with a nod......

......

Since this is the case, then the five mysterious ghost figures in front of you are undoubtedly the ninja!

But in this way, there are two problems in front of Chen Fei and them!

1. How should they get out of this time?!

That's right, this is indeed a big problem! Because for us, the strength of this ninja is really unfathomable! With our current combat strength, it is impossible to defeat the other side under any circumstances!

Second, what is the origin of the other party?!

Indeed, although there are many people in the opposing camp who are called Songzi and Yamamoto, according to Chen Fei's observation, whether it is the leader, Wen Yi who is called Songzi, or the wild monkey who is called Yamamoto, they should all be authentic Celestial Empire people. Especially the wild monkey, with a Tangshan accent in his mouth, is clearly a native of Tangshan.

But why did these people take that Japanese name?

Moreover, this ninja is an ancient and mysterious profession, which is theoretically only owned by the island country, and can be regarded as a specialty of the island country. But why are these ninjas hired by these Celestial Empire people?

You must know that ninja was originally just a term for "ninjutsu cultivators", and some of the "ninjutsu cultivators" of their own factions themselves have many disciples. These "ninjutsu practitioners" themselves or their disciples privately used the "ninjutsu" they had learned to cultivate an "exclusive private army" owned by themselves, and began to manage in the form of a corporatized and militarized business philosophy, sometimes receiving money to become professional killer mercenaries, and sometimes being hired by government units and departments to carry out tasks behind enemy lines.

However, because the government unit analyzed and evaluated it from the perspective of return on investment and investment risk, it was found that the strategic value, mission efficiency and loyalty of ninjas were higher than those of ordinary spies and killers, so the "ninja" gradually attracted the attention of government units in the later period, and therefore began to have an exclusive ninja force belonging to the government.

Although "ninjas" are the same as "spies", they are all organizations that belong to the "special operations level". But the difference between ninjas is that in addition to the basic training of ordinary spies, there are also more complex and non-simple mission forms, which are higher than ordinary spies!

Therefore, at this time, according to Chen Fei's speculation, the other party's organization must have a great origin! Moreover, it is likely to be a mysterious organization from the island country or even an organization affiliated with the government of the island country!

Otherwise, it would be almost impossible to use a top spy like a ninja......

......

"Did you hear that?!I said you!Hurry up and get into the cellar below!......" The other thug shouted at Er Lei, who was standing at the mouth of the cellar!

"Me?oh...... Down, down...... Get off ...... immediately" Er Lei said a little incomprehensibly, and looked at Chen Fei with a frown as he spoke. It means Yuan Fang, what do you think about this? Should I go down or not?

And Chen Fei also frowned and looked at Er Lei, neither nodding nor shaking his head, which means that you can do it yourself.

Obviously, at this time, Chen Fei had no decision-making power at all, and he didn't have any tricks to do.

So, Er Lei pounced along the rope and slipped down......

......

Soon, more than a dozen people entered the cellar under the coercion of the other party, and there were not only Erlei Ye Qiusi old cats, but also some villagers. Of course, the stinky Liangzi is indispensable, because the other party really doesn't want to leave this master on for one more minute.

At this time, when Chen Fei took the initiative to ask to go down, he was stopped by the leader.

It was clear that the leader was reluctant to run down and search him.

In fact, Chen Fei basically clarified the leader's intentions at this time. Obviously, the leader was reluctant to shoot the crowd after some deliberation, because it would be too ostentatious. If the body is found in the future, the police will definitely investigate this matter as a major case, and they will inevitably investigate it to the end.

However, at this time, he was bound to put everyone to death, because by this time everyone already knew his original identity.

So, the leader came up with a compromise......