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---Secant---

Under Zhao Yan's expectant gaze, Jiang Xinyue brought a silk cloth map with an area of at least two square meters.

When the silk cloth is evenly spread, the geographical map of the mountains and rivers in the style of abstract ink painting appears in front of Zhao Yan's eyes.

The scale of the map is unknown, the direction is unknown, and the legend is unknown, if it weren't for Jiang Xinyue explaining it next to him, and clearly marking the names of the countries of Taikang, Jiuchu, Xiong Qiguo, and Chaoguo, as well as the approximate national borders, it would take Zhao Yan some time to understand the map.

However, after being able to understand it, Zhao Yan saw from the map that the mountains, rivers and plains in the map were divided into thirty-six states according to the natural geographical demarcation line - the Jiuchu Empire occupied the territory of almost nineteen states, followed by the Taikang Imperial Kingdom that occupied the territory of Kyushu, and as for Xiong Qiguo and Chao Kingdom, each country accounted for four states.

The remaining states are divided by various small forces with strange names, and in this "Map of the Thirty-six Southern Prefectures", these small forces are not even counted as countries.

Zhao Yan even found a large mountainous area on the map, near the southeast salient of Taikang Kingdom, which covers a considerable area and is generally marked as the "Thirty-six Departments of the Shanman".

In other words, in this world, do you prefer the number thirty-six?

Zhao Yan was sure that he had found the keyword thirty-six in many places on the map.

Thirty-six Shanman, thirty-six Black Towers, and thirty-six serial docks in the front and back rivers...... Labels like these can be found everywhere on the map.

Of course, what Zhao Yan is most interested in, or the most impressive, is still the thirty-six mountain barbarians, after all, he only met the two "barbarian princesses" from the thirty-six mountain barbarians yesterday and wanted to hire him to kill the tiger demon.

After paying attention to the thirty-six parts of the mountain barbarian for almost three seconds, Zhao Yan took out a scroll from the bamboo slip scroll related to the red-faced demon bird and quickly untied it, rolling it to the place where Jiang Xinyue had marked.

With a movement of his head up and down, Zhao Yan, who wrote down the place names involved in the records on the bamboo slips word for word, began to look for the corresponding places on the "Map of the Rivers and Mountains of the Southern Thirty-six Prefectures" spread out.

It's a pity that this map of abstract painting made Zhao Yan very difficult to find.

"Sister Xinyue, do you know where the Lonely Moon Mountain on the banks of the Luomi River is located?"

Zhao Yan asked casually, with about five points of hope.

"Nuo - this is it, it is located in the lower right corner of Xiangshi Prefecture, do you see that wicker lake? The mountain range not far from the wicker lake is the Guyue Mountain, the birthplace of the Luomi River. ”

Jiang Xinyue surprised Zhao Yan again, she was extremely familiar with this map, Zhao Yan's voice had just fallen, and she had already pointed out the approximate location on the map.

"Sister Xinyue, you shouldn't have looked for this place on the map before, right?"

Because of his surprise, Zhao Yan couldn't help but glance at Jiang Xinyue again.

"Never, why am I looking for this place?"

Jiang Xinyue asked rhetorically.

Zhao Yan, who looked at Jiang Xinyue, thought that Jiang Xinyue was not lying to himself, so he could only identify this situation as Jiang Xinyue was an aborigine, so he was more familiar with this world than himself......

But in the following time, when Zhao Yan, who couldn't find the specific location, found those places one by one under the guidance of Jiang Xinyue, Zhao Yan had to revise his judgment again.

Zhao Yan felt that the main reason for Jiang Xinyue's strong ability to recognize maps was not that she was familiar with this world, but because she had an innate sensitivity to maps!

In other words, it's a gift.

This is a talent that is better than fake falling, and you can't learn it.

So since it's talent, there's nothing to envy.

With this in mind, Zhao Yan finally marked the places recorded in the bamboo slips on the map one by one, witnessing and even successfully hunting the red-faced demon birds.

Then, Zhao Yan stretched out his finger and began to make a gesture between the dots, and he drew a circle with an unequal size.

When Zhao Yan first started to compare, Jiang Xinyue, who was watching, was full of incomprehension, but after Zhao Yan gestured for a while, she suddenly sighed.

The superhuman talent for the map made Jiang Xinyue already understand that what Zhao Yan wanted to do was clearly to find a central point for those originally isolated points!

Erlang is clearly assuming that the red-faced demon bird has a fixed nest, and then because he flies around at will every day, he is found everywhere in all directions!

Although those red-faced demon birds may not really have such a fixed nest, at least the chances of finding the red-faced demon birds by doing so are more likely than running around aimlessly, isn't it?

Clever!

Why did no one think of this solution before?

Jiang Xinyue almost couldn't suppress the surprise in her heart and made a louder noise.

After a long period of comparison, Zhao Yan finally succeeded in finding the center point, but this center point made Zhao Yan regret it a little.

Hey, I should have promised those two barbarian princesses to take their bounties to fight the big tigers...... Three thousand taels of gold, it's really not too little.

Yes, the location of the center point that Zhao Yan finally confirmed was where the 36 Shan Barbarians were located, the strange mountains that were painted like jagged ghosts.

"Erlang, this may indeed be a good way, and it may make it more likely for you to find the red-faced demon bird, but this mountain where the thirty-six parts of the mountain range are located, and the miasma is full of fierce beasts, it is definitely not a safe and good place. ”

Jiang Xinyue finally couldn't help reminding.

"Sister Xinyue, I don't plan to leave tomorrow, I think it will take me a few months to prepare for my departure. ”

Zhao Yan moved the realization from the map to Jiang Xinyue's face, which clearly showed a worried look.

"A few months is too short, I think two or three years of preparation is probably more appropriate, maybe you should write a letter to your father Rongyang County Duke first. ”

Regarding the preparation time set aside by Zhao Yan, Jiang Xinyue obviously felt that it was too short and reckless.

"Hehe, Sister Xinyue, you will know the Tao by then, there are some things that I really can't say too much about now, and I ask Sister Xinyue for your forgiveness. ”

Zhao Yan vaguely revealed some inside information, but even if the object was Jiang Xinyue, he would definitely not tell his biggest secret.

"What is the matter?" Jiang Xinyue's curiosity was obviously aroused, but fortunately, without waiting for Zhao Yan to respond, she waved her hand and said, "Erlang, just because I didn't mention this question just now." ”

Zhao Yan smiled, he pointed to a large number of bamboo slips in front of him, and changed the topic: "Sister Xinyue, I want to borrow these bamboo slips for serious and careful research, okay?"

"Absolutely. Jiang Xinyue replied without thinking: "I have asked someone to prepare the guest room for Erlang to live in, you can take a look in the guest room, um...... Don't sleep too late!"

Zhao Yan happily took the order, and now the gate of Daye City has long been closed, and he really can't return to the city.

After Zhao Yan struggled to hold a large pile of bamboo slips and went to the guest room.

Jiang Xinyue did not leave the study, but looked at the "Map of the Thirty-six Prefectures of the South" that was still spread out.

After staring at it for about a few minutes, Jiang Xinyue bit her lower lip hard, then turned around and disappeared into the candlelight and couldn't find the middle of the bookshelf.

Soon, Jiang Xinyue moved twenty or thirty bundles of bamboo slips out, and used the method used by Zhao Yan just now, marking on the map.

After all the markings are done, it is just like the method used by Zhao Yan to measure and find the center point.

And in the end, Jiang Xinyue's thumb was fixed in ...... Thirty-six states of Shanman.

"How so?"

Jiang Xinyue let out a low exclamation.