"This ......" Lu Dongzan hesitated.

He didn't dare to agree casually, in case the Tang Dynasty put forward any conditions that Tubo could not accept, he would never die. He looked at the rest of the Tibetan Mission, and everyone shook their heads slightly.

At this time, Li Shimin said: "Don't be embarrassed by Lu Dongzan. I have everything in Datang, and I don't need anything in Tibet.

I look at this, Lu Dongzan answered the question, and when I answered, my previous promise was still valid.

If you can't answer, the matter of harmony will be postponed and discussed, I appreciate you very much, you will stay in Chang'an to study for two years, study the culture of my Tang Dynasty, and go back to educate you Tubo people in the future. ”

"No, Your Majesty, this is too cheap for the Tibetans, it's not fair." The eldest grandson Wuji said.

"yes, that's not fair." Everyone said.

The foreign envoys also said, "Your Majesty, this is not fair, you can't favor one over the other." ”

Li Shimin waved his hand and said, "Okay, don't say it, I've made up my mind." ”

Then, he asked, "Lu Dongzan, would you like to continue to be tested?" ”

At this time, Lu Dongzan had no way out, he had passed the four tests with hard work, and he was about to succeed. Let him give up now, it is definitely unwilling.

What's more, in full view of everyone, if you give up, Tubo will become the laughing stock of the world.

Lu Dongzan and the Tibetan envoys discussed: "What do you think? ”

The Tubo people really have no way out, and at this time, Lu Dongzan was only the Tubo (foreign minister), and he had not yet served as Dalun (prime minister), and his status was not so important.

Grobie, the deputy envoy of Tibet, said: "The matter has come to this point, we can't give up the test, and we can't make people laugh at it." Besides, the conditions proposed by the emperor of the Tang Dynasty are not excessive, in case you lose, you can learn more things from the Tang Dynasty here, and it will be useful to us in Tibet in the future. ”

"Yes, my lord, I can't give up." Everyone said.

Lu Dongzan thought about it, and he didn't believe that the princess could have any problems to stump him. He said, "Okay, so be it." ”

Lu Dongzan stepped forward and said: "Your Majesty, I am willing to accept the test, but I am a man, Your Royal Highness the Princess, please don't go out of the matter of the woman's boudoir, I don't understand that." Hehe. ”

Li Shimin smiled: "Very good, Ling'er, you heard it, don't embarrass him about your daughter's family." ”

Li Leling said: "Yes, father." ”

She said to Lu Dongzan: "Your Excellency, I admire your intelligence, and the questions you give you are all good at as men. ”

Lu Dongzan said: "Her Royal Highness the princess, please ask the question." ”

Li Leling said: "The first question, please send a person to take a boat to the other side of the lake, find a random place, and stand still. ”

There are several ponds in the Imperial Garden, and the pond in front of you is about sixty or seventy meters wide from here to the other side.

Lu Dongzan sent a man to follow the eunuchs on the boat and crossed to the other side.

Li Leling said: "Your Excellency, may I ask, in the case of not being allowed to cross over, just over here, can you calculate the distance from here to that person?" ”

After she finished speaking, a eunuch brought a ruler, and the ruler had a soft ruler, 10 zhang long. There is also a wooden ruler that is one zhang long and one foot long. It was handed over to Lu Dongzan.

"This ......" This time it was Lu Dongzan's turn to be dumbfounded, not only Lu Dongzan, but Li Shimin, Li Tai and everyone were dumbfounded.

"Damn, I'm not allowed to go over, how can this be measured?" Lu Dong Zanmeng. With experience, he first felt that he couldn't solve this problem.

He pondered for a long time, and finally said: "Your Royal Highness Princess, I can't think of a way, please ask Her Royal Highness Gongzi to teach you." ”

He didn't believe that Li Leling could calculate this distance without being able to pass the lake.

Li Leling pointed to a little eunuch and said, "You go and calculate, and then tell your envoy." ”

A little eunuch's face was stiff and expressionless, and he bowed his head slightly and said, "Yes, Your Royal Highness Princess." "This thing is played by Li You.

After speaking, Li You asked a eunuch to stand still and a eunuch to stand by the lake, and Li You commanded the eunuch to move his footsteps, and formed a line with the Tubo man on the opposite bank.

Then, Li You picked up a square handkerchief, aligned the line with one side, and then directed the two eunuchs to walk forward along the other side of the handkerchief, also in a line of three. Make sure that the two lines form a right angle between them.

Li You picked up the handkerchief, walked along the back line, and when he saw that the distance between the two ends of the lake was about the same, he squatted down, spread the handkerchief on the ground, measured it with his eyes, and after repeating it several times, he and the Tubo people on the other side of the lake formed a diagonal on the handkerchief.

He asked a eunuch to stand here, returned to Li Leling, and said, "Your Royal Highness Princess, the distance from you to that father-in-law is the distance from here to the Tubo people on the other side. ”

Everyone looked at each other, unclear what was going on, and there was a lot of discussion. Only Lu Dongzan was pale and didn't say a word.

The deputy envoy of Tibet, Grobbi, was not convinced, and said, "I will go and measure it myself." As he spoke, he picked up a ruler and was about to measure.

Lu Dongzan said: "No need, I understand, admire." Your Royal Highness, I admit defeat. ”

Groopie was anxious, and he said, "How can you admit defeat? They may not be right. ”

Li Shimin didn't understand what was going on, so he said: "Lu Dongzan, tell me, what do you understand?" ”

Lu Dongzan said: "This handkerchief is square, each side is the same length, if you look diagonally, the distance between the two sides is the same.

As long as you measure the distance from this side, you will know the distance from here to the other side of the lake.

Admire Her Royal Highness the Princess. ”

"I see." Everyone basically understood, and there was a burst of admiration.

Li Tai was very puzzled, and said in his heart: "I am such a smart person, Lu Dongzan can answer the questions that come up." I know what Li Leling usually looks like, how could she come up with such an idea? ”

He looked closely and found that something was wrong with Li Leling. "Fake, this girl is not the third sister." Li Tai saw a problem.

However, Li Tai was very smart, he saw that Li Shimin and Empress Changsun were next to the fake Li Leling, and it was impossible for them not to see that this Li Leling was fake. If they don't expose it, he won't be stupid enough to expose the fake Li Leling.

At this time, Li Tai saw that the figure of the little eunuch was very familiar, and he also saw that this thing was pretended by Li You. Li Tai was silent, wanting to see what these people were doing?

Lu Dongzan was unconvinced, and said, "Your Royal Highness Princess, please come up with a second question." ”