Otaku Engineer in Great Tang Dynasty

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Yellow crown?

When Li Zexuan heard the name, he didn't realize it was very familiar. After a while, he remembered that when the Yanhuang Academy entrance exam was announced, Li Zexuan had investigated the family background of the top students. Second, Li Zexuan certainly has his relevant information on his desk, so Li Zexuan still knows a little about Li Chunfeng.

Li Chunfeng, Taoist Huang Guanzi, in the first year of Zhenguan, put forward 18 opinions on the "Wuyin Yuanli" written by Fu Renjun, a Taoist priest, and Li Er rewarded his talents and adopted 7 opinions, and gave them to Li Chunfeng, the general servant, and the entourage. Served in the Taishi Bureau.

The current Li Chunfeng is just a hairy boy who has just emerged in the courtroom. Few people will care about him, but Li Zexuan, who has traveled from modern times, understands what the three words Li Chunfeng mean. For this reason, he also specially asked people to check Yuan Tiangang's information!

Later, when he learned that there was no Yuan Tiangang in the court, he gave up. In fact, Yuan Tiangang didn't enter the court until the fifth year of Zhenguan.

"It turned out to be Chief Li Dao, disrespectful and disrespectful~!"

Li Zexuan returned a salute to Li Chunfeng and said politely.

Li Chunfeng looked at Li Zexuan seriously, which made Li Zexuan feel uncomfortable for a while. He always felt that Li Chunfeng's eyes seemed to have a penetrating power to see through all things. , He shuddered in his heart, and hurriedly transported the "Tai Xuan Jing", full of mental strength, and alertness.

Seeing Li Chunfeng's complexion suddenly turned pale, "I'm rude and disrespectful, Pindao was surprised when he saw Lord Hou's face, and suddenly the old problem happened again. "

Li Zexuan said with a smile: "It's okay, you and I belong to the same line of Taoism, so why should you blame me? I heard that the Taoist master is quite accomplished in calendar, astronomy, and arithmetic. Don't hide your clumsiness~!"

Li Chunfeng's eyes flashed, and he cupped his hands and said, "Young Master Hou has been praised! He has been a famous teacher since he was a child, how can he dare to compare with Master Hou for his subtle skills! Today, I want to use the telescope of Yanhuang Academy to prove it. I hope the Lord Marquis will give you some conjectures from the past in the past!"

Confirm some conjectures? I guess it has something to do with the calendar, right?

Li Zexuan thought in his heart, and at the same time promised: "The Daoist can use it, and the gate of the academy will be open to the Daoist at any time in the future. The Daoist can come anytime if he wants to use this telescope!"

Li Chunfeng's expression brightened, and he said, "Is this the truth of the Lord Hou?"

Li Zexuan said with a smile: "Naturally, it's true! If Ben Hou's expectations are not bad, the Taoist priest probably wants to use the telescope to deduce the calendar, right? Since ancient times, the calendar has been extremely important to the people's agricultural affairs. If this telescope can help the Taoist priest. , that is also the fortune of Yanhuang Academy and Ben Hou, isn't it?"

Li Chunfeng's expression turned solemn, and he bowed down sincerely and said, "Your Majesty understands the righteousness, and the poor people admire it so much that the people of the world will surely appreciate your kindness!"

Li Zexuan didn't expect it to be bad. The main purpose of his visit today was to see if the astronomical telescope of Yanhuang Academy could help him improve the accuracy of calendar deduction.

The so-called calendar, simply put, is the rule of measuring longer time intervals, judging climate changes, and predicting the coming of seasons according to the natural laws of astronomical changes. The calendar based on the cycle of changes in the moon phase (ie, the synodic month) is called the lunar calendar, and the calendar based on the rotation period of the earth around the sun (ie, the return year) is called the solar calendar.

The ancient Chinese calendar takes the return year as the unit of the year and the synodic month as the unit of the month.

As soon as the rulers of the dynasties came to power, they usually organized officials to overhaul the calendar, because the people's annual spring plowing, autumn harvest and other agricultural activities are all based on the calendar, and the importance of the calendar to the country can be seen from this!

Many people who have known the Chinese lunar calendar may sigh in their hearts, why are the twenty-four solar terms that exist in the lunar calendar for thousands of years to predict agricultural affairs so accurately? At the beginning of spring, we should start cultivating the land and raising seedlings. Rainwater should weed the wheat, and the wheat should be topdressed when Jingzhe is awakened. At the spring equinox, the wheat will joint and so on! And every Mid-Autumn Festival, the moon has never been found to be out of round. After working for thousands of years, the creator of the calendar and the discoverer of the law can't help but admire the five bodies.

In comparison, the Gregorian calendar commonly used in all countries in the modern world is simply weak!

In fact, the Chinese lunar calendar is based on the "twenty-four solar terms" of the pure solar calendar. The twenty-four solar terms are purely solar calendars, so the prediction of agricultural time is very accurate. Therefore, the Chinese lunar calendar is a lunar calendar that corrects the cycle of the solar calendar.

The twenty-four solar terms are purely solar calendars, and their cycles are the same as the revolution cycle of the earth. Observed from the earth, the moment when the sun passes the vernal equinox on the ecliptic is set as the beginning of the new year and the end of the old year. The ancient dynasties established Qin Tianjian to observe and correct every year to ensure accurate positioning of the vernal equinox and accurate agricultural time.

Li Zexuan felt that giving the telescope to Li Chunfeng was exactly the kind of gifting a sword to a hero. In this way, Li Chunfeng might be able to perfect the calendar. This is a major event for the benefit of the country and the people! Moreover, if Li Chunfeng discovered the eight planets of the solar system through a telescope and proposed a heliocentric theory or a solar system theory, it would be considered a contribution to the astronomical cause of Datang, right?

"Good you, Marquis of Yongan~! I didn't know what conspiracy and tricks you used to make Sun Shenyi move to Yunshan, and now you want to borrow this telescope to dig my people~?"

The two were chatting happily, and they seemed to meet each other late, but Li Er walked by and didn't feel good.

airway.

He has seen people very accurately in his life, and Li Er still has high hopes for Li Chunfeng.

"This minister is frightened, and this minister, Li Chunfeng, will always be loyal to His Majesty and the Tang Dynasty~!"

Maybe Li Er is a joke, but Li Chunfeng hasn't been in contact with Li Er for a long time, and he doesn't know much about Li Er's character. As the saying goes, accompanying the king is like accompanying a tiger, he dare not take Li Er's words as a To listen to the joke, then quickly said.

Li Zexuan didn't have any fear, he immediately heard that Lao Li was joking, and he reluctantly said: "Your Majesty, this minister wants to use the academy's technology to help Li Shilang improve the calendar, and the two of you are working for your majesty, When the Tang Dynasty does things and does things for the common people, how can you talk about poaching people?"

This, although Li Zexuan did have that thought in his heart, it was impossible for him to say it!

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