The nine-square grid originated from the Hetu Luoshu, which was called the "vertical and horizontal map" in ancient China, which refers to the nine numbers from one to nine, which are arranged in a grid of three times three, and the sum of the three numbers horizontal, vertical and oblique is equal to fifteen. In modern mathematics, this is also called the "third-order magic square".

Tang Jue first came into contact with Jiugongge when she was a child, not because of her master's teaching, but after she read Jin Daxia's famous book "The Legend of the Condor Heroes", she memorized a mantra in it: two and four side by side, six or eight for the feet, three on the left and seven on the right, one on the nine, and five in the center. At that time, I thought it was very interesting, and in order to confirm it, I took a small branch and drew a nine-square grid on the ground, which was discovered by her master, and as a surprise, she explained to him the wonders of the nine-square grid.

At this time, Nangong Yi and Long Teng both saw that this vacant place should be "nine", and Nangong Yi continued: "It seems that this is a nine-palace gossip map, the inside is the nine-palace grid, and the outside is the gossip map!" ”

Tang Jue nodded: "Not bad!" The vacant nine in the nine-square grid is just filled in the gossip! ”

Long Teng counted, the eight directions outside, plus the corpse that was broken up by Guan Changtian just now, it was really sixty-four, plus the thirty-six bodies of "nine" missing in the nine-square grid, it was exactly one hundred, no more, no less!

In Long Teng's opinion, this kind of formation is already very difficult, and Tang Jue can see it.

Several people were very happy, Nangong Yi even kissed Tang Jue on the cheek, and Long Teng felt sour when he saw it. Nangong Yi had already jumped up, ran to the mechanism just now, and pressed the ninth button.

Just listen to a few soft "clicks". Then came the sound of gears turning, and the rubble on one of the mountain walls peeled off, revealing a gate carved with a bronze beast, which slowly opened and led to a gently sloping passage with steps inside.

Several people in the cave looked at each other, and they all jumped for joy. This passage is very simple, unlike the many murals on the stone wall just now, this passage has nothing. After going down from the passage, it is not on the ground. Rather, it's a huge pool. The flashlight shone on it, and the silver light shone on it.

Nangong Yi walked in front, and at this time, he suddenly raised his hand and made a move to stop advancing. Long Teng immediately said: "There seems to be a mercury pool in front." Everybody back off! ”

Mercury. Mercury, commonly known as mercury, is a highly toxic heavy metal. The reason why Longteng told everyone to retreat was because mercury vapor was highly toxic. Inhalation of small amounts can cause dizziness and even death from shock.

With the light of the flashlight, Tang Jue saw that in addition to the shiny luster on the surface of the mercury, there was also pink smoke on the surface of the mercury pool, which was mercury steam.

Probably because it is underground, the mercury evaporates relatively slowly, only evaporating a little over thousands of years, and the vapor formed is only pink. The steam of mercury is originally red, but the reason why it is pink is probably because of the small amount.

At this time, no one will go against their own lives and run forward as a hero.

Mercury also has an antiseptic effect, so it is not surprising that there is a pool of mercury in the tomb, and the ancients wanted to preserve the remains of their ancestors from decay.

The pool of mercury was so large that it filled almost the entire chamber, leaving only a semicircular platform on the opposite side, like an altar.

Just now, Tang Jue kept asking Lian Lian, where is the altar, and when he really saw it at this time, he still felt that Lian Lian was very incredible, he could actually understand her words, and he actually brought it to the right place. Tang Jue recalled the scene just now, and she even felt that she was able to discover that Jiugongge was also the credit of her love.

Tang Jue was even more precious in her heart, and she even wanted to wait until she went out to know that she would let Nangong Yi officially give Lian Lian an identity. Just now she tried to call herself a mother to Lianlian, and Lianlian liked her very much.

At the end of the passage there is a wooden bridge leading to the altar, this burial chamber is not known who designed it, if you want to pass through the mercury pond and climb the altar, you must pass through the flat bridge, and everyone can see the pink smoke on the flat bridge.

Nangong Yi moved the flashlight up further, and could see that the pink mist was gradually thinning, mercury is a heavy metal, even the specific gravity of gas is very large, and the mass in the air is heavier than air, so if you want to pass through the flat bridge, as long as you hold your breath, you can still pass.

It's just that the flat bridge looks dark black, and I don't know if it's because the substances coated on the bridge deck have undergone chemical changes due to the action of mercury, or because the wooden bridge has rotted over time, but in short, the whole flat bridge looks crumbling.

At this time, Nangong Yi's physical strength is no longer as good as just now, and the surface of this mercury lake is also very large, it is impossible for Nangong Yi to bring everyone over one by one.

Guan Changtian helped He Suan and said to Nangong Yi: "Yi'er, you just take Ah Suan alone, and we will figure it out ourselves." He glanced around, in addition to Nangong Cheng being an ordinary person, Long Teng was also an ordinary person. He himself could barely take Nangong Cheng over, and the remaining Long Teng was just handed over to Tang Jue.

Nangong Yi looked at it and said, "I think it's better for me to bring Ah Suan, Second Uncle and Brother Long over, Master, you and Xiao Jue go over by yourself." ”

Guan Changtian smiled and patted him on the shoulder: "Master knows that you are filial, but can't you trust Master's ability?" As soon as he said this, Nangong Yi was embarrassed to say anything, so he only got it: "Of course not, then Master, be careful!" ”

asked Tang Jue again: "Xiao Jue, are you okay?" ”

Tang Jue glanced at Guan Changtian and said in his heart: Your master is okay, why can't I? However, she didn't show this emotion on her face, just nodded: "Don't worry!" ”

Nangong Yi also nodded, grabbed He Shu's waist, jumped on the Blazing Flying Sword, and said, "I'll go over first, and I'll come to answer if you can't support it later." ”

When Guan Changtian heard him say this, he hurriedly said: "It's okay, be careful yourself!" ”

He didn't have much confidence in his light skills, what he was best at was swordsmanship and martial arts. Now when it came time to use these carving insect skills, he couldn't use them. Nangong Yi took He Shu, stepped on the flying sword, and first passed the mercury pool, the blazing flames emitted red and blue light, and flew over the mercury pool like lightning, and in less than ten seconds, they had already fallen on the opposite altar.

Nangong Yi shouted, "Do you want me to answer you?" "He really doesn't worry about his master, he knows the level of his master, if something happens, it will be his second uncle who is unlucky. Moreover, now that Nangong Li and Qin Tian are missing, and there is already a wounded person in their team, there must not be another injured person.

But Guan Changtian had already said what he had just said, and it was impossible to regret it at this time, his face did not allow him to do this, so he could only grit his teeth and bite the bullet. (To be continued.) )