The sky was slightly bright, and a ray of sunlight shone into the ruined temple, but the birds and flowers were fragrant, quiet and quiet.

Song Yang opened her eyes and found that she slept very soundly and deeply, a girl sleeping in a sleeping position, where did she look like a little woman who was burdened with family responsibilities and roamed the rivers and lakes?

He came to the stone Buddha and looked closely, the stone statue was not too high, only more than three meters, but there were many stomachs, more than two meters horizontally, which had exceeded the general Maitreya Buddha proportions. The stone Buddha stands here, after thousands of years of wind and rain without fading and falling off, the stone quality that is still amazing is very fine and smooth, the workmanship is fine, obviously it is carved from the best white marble.

Such a dilapidated small temple, such a rare stone Buddha, seems extremely asymmetrical!

He was engrossed, observing every detail on the face, as long as it was uneven, he went up with one hand and touched it to feel if there was a special mechanism.

Nothing was found in front of the statue, and he turned to the back, looking around, and just as he was almost giving up his thoughts, he felt a protruding ring in a recess behind the statue, and he gently tried to turn it from side to side.

It's moving, it's going to turn!

He was ecstatic, and with the turn of the ring, the back of the Maitreya Buddha statue parted.

A stone tablet stands in the middle of the belly of the stone Buddha.

Song Yang turned on the flashlight, and the inscription on the tombstone was clear, which was Cao Zhi's seven-step poem in italics.

Hearing some movement behind the stone Buddha, Mu Yuhan had also woken up and stood beside Song Yang, tears in the corners of his excited eyes.

She muttered to herself, "Finally found, finally found!"

"Don't be too happy just yet, you don't seem to see a sword hole anywhere?" Song Yang was afraid that she would be too excited.

"The sword hole is not actually on the tombstone, but on the gate inside." She pressed hard at the end of the poem, and was actually pressed in, and a dark hole suddenly appeared on the ground behind the tombstone.

It turns out that Maitreya Buddha has something else in his belly!

She was in a hurry to enter, but Song Yang grabbed her, "Don't worry, I don't know what's going on inside, so I just said it." ”

The two of them entered the cave one after the other.

Mu Yuhan took a deep breath and took out a marble-sized night pearl from his bosom to illuminate the scene in the cave.

"Wow, you're so tall, gotcha, go back to the sword to give it to you, how about exchanging this night pearl?" Song Yang asked with a cheeky smile.

"You're not afraid of losing?" She glanced back.

"As the saying goes, the sword is given to the beauty, and the pearl is given to the hero......"

"Since you think so, it's decided!"

"Or, swap now?" Song Yang was born a poor child, and it was not easy for the salted fish to turn over in the past two years, but I have never seen such a big night pearl.

"Okay!" She took the sword, and the Night Pearl handed it to Song Yang.

In front of me is a slender road hundreds of meters deep, the road is extremely deep, there are stone walls on both sides, you can see every twenty meters, there is a tiny niche in the place where the head is high, an oil lamp is in it, and strangely it has not dried up.

Song Yang lit them one by one, and suddenly the corridor became brighter step by step.

The road is crooked, and you can't see the innermost. But there was not much dampness in the cave, and the air was fresh and there was no turbidity, which surprised Song Yang.

"Let's go!" Taking a deep breath, Mu Yuhan made a careful gesture, and continued to walk forward with Song Yang all the way, carefully moving forward for a stick of incense.

Suddenly, a huge stone door carved with various patterns stood in front of the two of them.

In the middle of the stone gate, there is a wide and thin hole.

"This should be the gate." Song Yang observed the pattern of the stone gate, and there was nothing special about it.

She didn't hesitate to insert the Big Dipper Sword.

Sure enough, it fits perfectly!

I felt that my feet were shaking slightly, and with a roaring sound, the stone door actually slid open to the sides so easily.

Before the stone door was fully opened, a trace of golden light came out of the crack in the door, and as the stone door opened wider and wider, both of them opened their mouths in surprise.

Behind the stone door, there is a stone house with a radius of dozens of zhang, the air in the hall is abundant, like a cyan mist, the stone house is empty, but there are many small doors on the four walls, I don't know where it leads, and there is a huge dome above, there is a small hole in the middle of the dome, and the light can shine directly into it, and it is poured into the center of the hall floor.

It was a dark iron square, embedded in the ground, and on the iron block, carved square-square, each with an ancient Arabic numeral, but seven squares were empty.

Song Yang looked over one by one, and couldn't help but make waves in his heart.

Master, definitely master!

Mu Yuhan just wanted to push those small doors,

"Don't move," Song Yang hurriedly drank her, "There may be a mechanism." ”

"Organs?" She stood on Song Yang's side and followed Song Yang's gaze to look at the pattern on the ground.

"What is this?"

"Magic Square."

"Magic Square?" She looked confused, as if she had heard the term. Yes, she remembered that Song Yang's consultation center was not just the word magic square.

Song Yang knew that she was puzzled, and he took out the jade magic square that he hung on his chest, "My front is a round convex surface, engraved with Arabic characters, and the content is a passage from the Halal language of the Quran. On the back, there are four lines and 16 squares, each of which is filled with Arabic numerals, and the numeral form is Arabic in the 13th century. This is a fourth-order magic square, and the number used here is from 1 to 16, a total of sixteen numbers. They are arranged in four rows, columns, horizontal rows, and diagonal lines, each with four numbers, and the sum of them is 34.

8～11～14～1

13～2～7～12

3～16～9～6

10～5～4～15

See, the sum of this magic square, also called the sum of magic squares, is 34. Since 3+4=7,7 had a special meaning in the medieval Islamic world, it represented seven heavens, seven oceans, seven hells, seven directions on the earth, seven days of the week, including the Big Dipper in your hand. ”

"What about this under your feet?"

"This one is much more complicated than the one on my neck, you should know that the Yuan Dynasty was greatly influenced by the Arab world; The Mongol aristocracy from the north generally believed in Islam, so the magic square was quite popular among the royal family and nobles for divination and prediction. But designing this magic square is a very great master, the level of a mathematician, not only a mathematician, because it is also combined with the mechanism ambush, which is too great. ”

"Why do you say that?"

"The six rows and six columns of this magic square are very peculiar...... Song Yang took out a piece of white paper, drew six six thirty-six grids, and filled in the existing numbers according to the magic square on the ground.