Although Yi He is not as fast as Chunting's thinking, if it is compared to us, it is naturally much smarter than us.

He is worthy of the dual identity of the heir of the Guigu Valley and the relics of the Houtu, and he actually saw through the secret here with just a few reminders without a careful explanation in Chunting.

"Time, it turns out that the focus here is on time!"

Just as I was thinking about all this, Ling Xuan heard what Yi He said and suddenly became enlightened, only to see him look at Yi He with admiration, and at the same time, he couldn't help but shout out loudly.

"It turns out that the real secret is not what happened that year, but what year it was!"

Chunting finally stopped being silent after seeing our reaction, and he looked at Yi He with a subtle look while confirming our guess in his mouth.

"What Yi He said is right, the mystery in this Tongtian Palace is actually above this time, as long as you know what year the first year of Long Live Tongtian is, then you don't have to pay attention to everything else."

Although Yi He had a delicate relationship with Chunting, he also had to admit that Chunting was the person who was actually in charge of our group, so after he said his guess, he had been observing Chunting's reaction with his spare eyes.

And after Chunting opened his mouth to confirm his guess, Yi He finally let out a sigh of relief, and couldn't help but look at the few people who were still confused and laughed.

Although Xue Nan still didn't know the mystery here, she didn't play and ask, but looked at Chunting with confused eyes, trying to get an answer from Chunting's mouth.

"Chunting, why are you talking the same as tongue twisters, what is that year? Didn't we already know that this was an era name, and since it was an era name, it must have been a certain year that had passed, and was there something wrong with this time? ”

Now that we have a clear understanding of the mystery here, there is naturally no need for Chunting to continue to be silent, so after hearing Xue Nan's question, he no longer refused to answer, but smiled slightly and watched Xue Nan talk eloquently.

"You're right, we did know for a long time that this Long Live Tongtian was the era name used by Wu Zetian, but we didn't really understand why this era name appeared here.

In fact, it is not that complicated, and the biggest reason why this era name appears here is to imply that we need to think from the perspective of the chronology, and only in this way can we discover the hidden mystery here. ”

Chun Ting originally planned to explain this matter concisely, but looking at Xue Nan's expression as if listening to a book from heaven, he could only explain further.

The so-called chronology refers to the method by which people name the era, and the main chronological method we currently use is the Common Era.

Although the people of ancient times did not understand what the AD chronology was, it did not mean that they did not know the chronology, and their dating methods were more diverse, not only the imperial chronology with the imperial chronology of Long Live Tongtian, which was calculated by the imperial chronology, but also the most ancient Ganzhi chronology in China.

The so-called imperial chronology refers to the chronological method that comes according to the year or year name of the emperor's accession to the throne, such as the fourth spring of Qingli in the Yueyang Lou Ji, which refers to the fourth year of Song Renzong's Qingli, and the ninth year of Yonghe in the preface of the Lanting Collection, which refers to the ninth year of Yonghe of Sima Dan, Emperor Mu of Jin.

The advantage of imperial chronology is that it is simple and easy to understand, but the disadvantage is that it is not precise enough, especially when multiple countries exist at the same time.

However, while the ancients used the imperial chronology, they also did not forget another dating method that has been handed down since ancient times, the Ganzhi chronology. 360 Literature Network

As early as 2000 B.C., China had its own calendar, and for a long period of time, the chronological method used in China was the Ganzhi Era method.

The so-called stem branch, is the general name of the heavenly stem and the earth branch, the ancients matched the order of the stem branch, exactly sixty years for a cycle, this cycle is called a Jiazi, to the beginning of spring every year, the cycle and the beginning, the cycle record, this is commonly known as the stem branch table.

The wise ancients used the Ganzhi chronology together with the imperial chronology, such as the Yonghe nine years old in the Lanting preface, in which the former is the year name and the latter is the Ganzhi, and the accuracy of the time can be guaranteed under the mutual confirmation of the two.

And in the Tongtian Palace where we are now, the layout here is a perfect combination of the imperial year and the Ganzhi year in another way.

Shen Lang listened to Chunting for a long time, but he didn't hear any clues, and couldn't help but interrupt.

"Brother Ting, although you said so much, I still don't understand, what does the dating method used by the ancients have to do with our current situation?"

"You idiot, you don't know how to use your brain."

Ling Xuan looked at Shen Lang quite helplessly, he looked at Chunting tentatively, and after getting Chunting's acquiescence, he took Chunting's words and asked Shen Lang.

"You say, is there any resemblance between this Ganzhi Chronology and what we found in the Tongtian Palace?"

Shen Lang was actually not stupid, he was just too lazy to think, he couldn't help but shrink his neck after hearing Ling Xuan's scolding, and then frowned and thought about it seriously, and had his own answer.

"The so-called Ganzhi year is composed of the combination of the heavenly stem and the earthly branch, and these twelve days will evolve from the Ganzhi, and the Qin seal text on these twelve doors is the specific content of the twelve earthly branches.

"You can teach."

Seeing that Shen Lang was finally able to think seriously, Ling Xuan's face was full of relief, and at the same time, he didn't forget to encourage him.

"Shen Lang, you're right, this is the connection between the two, you keep this train of thought, and what ideas do you have to continue."

Seeing that his guess was confirmed, Shen Lang couldn't help but feel confident, and after connecting all the discoveries together in his mind, he looked at us confidently speaking.

"The Ganzhi year is a combination of the heavenly stem and the earthly branch, because every sixty years is a cycle, so the cycle is recorded over and over again, that is to say, each year has its corresponding heavenly stem and earthly branch, such as Gengzi year, Guiyou year, Ding Mao year and so on.

And these twelve days will be related to the Qin seal text is all related to the Ganzhi, both of which can be used to represent the heavenly and earthly branches, so can we think that as long as the date expressed in the imperial chronology on this plaque is converted into the expression form used in the Ganzhi chronology, then we can get the secret we want to know! ”

Hearing Shen Lang's excited speech, we glanced at each other and applauded him at the same time.

Shen Lang is really a blockbuster, and the conclusion he came out of his mouth is that we have speculated on the biggest mystery in this Tongtian Palace after a lot of hard work!