When Lao Liu's carriage returned to Jilong Mountain, it was already dark.

"Your Highness, there is a monk who has been waiting for a long time." When the king of Chu got out of the car, the guards guarding the door hurriedly reported.

"Well, I see." The sixth nodded, and as soon as he got out of the car, he saw a shiny bald head, shining in the moonlight.

"Amitabha, poor monk Daoyan, meet His Royal Highness the King of Chu," the fat monk saluted to the huge prince, and said with tears in his eyes: "I finally saw His Royal Highness, but fortunately the poor monk did not give up." ”

"Hehe, Master Daoyan, I have admired the name for a long time." The sixth looked at Monk Daoyan and asked with a smile, "Has the master been waiting for a long time?" ”

"Yes, I waited for two hours today, but before today, the poor monk waited for His Highness for six years." Dao Yan said excitedly: "I finally got my wish today. ”

"Oh, really?" The sixth child was a little surprised, how old was he six years ago? Dao Yan has a discerning eye?

However, he didn't ask in detail, so he smiled and invited Dao Yan into the school: "The master shouldn't have eaten, if you don't dislike it, let's have dinner with this king." ”

"Hehe, I'm about to ask the prince for a bite of fasting." Of course, Dao Yan would not be polite to him, and followed the sixth man with a smile and said, "I can't hide it, the poor monk had breakfast today." ”

"Didn't you eat twenty boiled eggs at my master's place?" The sixth child unceremoniously demolished him.

"Uh......" Dao Yan said without embarrassment: "Twenty eggs can only be regarded as a snack." ”

"Haha, the master has a good appetite." Zhu Zhen laughed and said: "This king likes it, he can cook like me." ”

As he spoke, he commanded: "Let the canteen work overtime, and only take care of the hard dishes in your hand." ”

~~

Arctic Pavilion, a huge mahogany table in the hall, is full of large plates and bowls of big fish and meat.

Dao Yan held a soy sauce elbow in his left hand, clicked and spun violently, and his right hand was as fast as flying, filling the chicken and meat slices in the dish into his mouth.

They feel that they owe their Highness an apology, and they usually feel that His Highness is gobbling up and eating indecently, but compared with this monk whose mouth is like opening three times the speed, His Highness's eating appearance is simply delicate.

"Eat slowly, yes." Even the sixth child was shocked, but he didn't expect him to be Yao Guangxiao like this.

"Woo, you can be regarded as eating meat...... Monk Daoyan nodded, but his eating speed did not slow down, and he could even say vaguely:

"The poor monk was strictly controlled by the abbot, and he didn't allow me to eat meat, otherwise I would be expelled from the Heavenly Realm Temple......"

"Hahaha, since the master loves meat so much, why should he be a monk? It's straightforward to be vulgar. Zhu Zhen said with a smile.

"It is worthy of being a master and apprentice, His Royal Highness and Uncle Chengyi ask the same questions." Dao Yan said with a smile: "It is easy for a poor monk to find a monk, he can eat and drink in the temple for nothing, and he can go out under the guise of the Great Heavenly Realm Temple...... Oh no, it's respectable. ”

"That's right, it's a golden job anyway." Lao Liu nodded and said no more.

After eating a dinner for about eight people, Dao Yan burped, and his oily lips were full. "Comfortable, it's been a long time since I've eaten so well."

"The master can come to the tooth sacrifice at any time." Lao Liu smiled: "Go back and ask someone to get you a meal card, and when this king is not there, you can go to the canteen to eat." ”

"Thank you, Your Highness." Dao Yan thanked him happily.

~~

The two moved to the study to have tea again, and Dao Yan was very interested in the furnishings of the study of the King of Chu.

Not to mention the huge and complicated books, just the long telescope, the large ball that can be rotated, and the huge model of the sailboat, all of which are very eye-catching.

"It's okay, just look at it, move it." Seeing that he wanted to spin the big ball, the sixth smiled and agreed. The king is so atmospheric.

As soon as Dao Yan's thick fingers pushed, he saw that the big ball was spinning around a general axis. He looked at the patterns and words on the top, there are the names of the Ming Dynasty, Japan, Siam, Persia and other well-known countries, as well as some places such as 'Franc Ji', 'Yin Kili', 'Lan Xi', etc., which he has never heard of.

Zhu Zhen stood behind him, ready to give the monk a little geographical shock.

But I heard Dao Yan ask with a look of surprise: "Is this the Earth Circle Instrument?" ”

"I'll wipe ......" the sixth almost split. If it had been a year ago, he would have asked the question, 'Master Ling also crossed over?' ’

But now that he has done an in-depth study of the history of ancient science, he will not make a fuss. He asked quietly, "Does the master know that the earth is a sphere?" ”

"Uh-huh." Dao Yan nodded happily, pointed to a set of books on the bookshelf and said: "Mr. Yuandu's "New Book of Leather Elephants", the family teacher has also taught poor monks, it is really a university in the world, but it is a pity that it is not valued by Shilin. I didn't expect His Highness to dabble in it. ”

"Hahaha, the master is really erudite...... Lao Liu took down the set of "New Book of Leather Elephants" from the bookshelf and said: "Such a treasure of China was almost buried in silence, but fortunately, the master is well-read and recommended it to this king." ”

Before last year, Lao Liu had always thought that the ancients firmly believed that the sky was round and the earth was round. But last year, when he began to study and sort out the existing academic results in order to compile a textbook, he was shocked to find that Chinese astronomers already knew that the earth was a ball.

And it is not Zhang Heng's simple description of 'the ground is like the yellow in the egg', but it is obtained through scientific observation and calculation, and rigorous argumentation.

The monks of the Tang Dynasty and Guo Shoujing of the Yuan Dynasty measured the height of the North Star at the north and south ends of the Chinese territory and found that the height of the North Star was different at different latitudes.

Yelu Chucai of the Yuan Dynasty also organized people to record the lunar eclipse of Kaifeng City and Central Asia to think about Gancheng. It was discovered that the lunar eclipse time in Kaifeng City was more than one and a half earlier than that of Central Asia. The existence of longitude was discovered through the different times of lunar eclipses in different regions of the east and west.

Therefore, after large-scale measurements obtained scientific data, Zhao Youqin of the Yuan Dynasty, also known as Mr. Yuandu in Daoyan's mouth, concluded in his "New Book of Leather Elephants":

"Measure the height of the North Pole, and the time of the lunar eclipse in the east and west, sooner or later, the earth is round, and the earth should be the proof of the heavens."

Through the difference in longitude and dimension, it is proved that the earth is a circle.

And this is not a family opinion, but a common knowledge recognized in the astronomical community at that time.

According to this, the astronomers of the Yuan Dynasty also made the first globe in human history.

Although Zhu Zhen has never seen the real thing, he found a clear record in the "Yuan History, Volume 48, Tianwen I" compiled by Song Lian and others:

'It is made of wood as a sphere, seven parts of water, three parts of the earth, and three parts of the earth, and its color is white. Painting rivers, lakes and seas, the veins run through it. The painting is a small square well, in order to measure the vastness of the circle and the distance of the road. ’

A few decades ago, astronomers in the Yuan Dynasty made a globe, and it was made with latitude and longitude......

(End of chapter)