"Matteo Ricci and his apprentice Chang Xu Guangqi," Zhu Changxun lowered his eyes and thought for a while, and said with a narrowing of his eyes, "It is said that it was translated from a foreign book brought by Matteo Ricci from the West, what is the name of the original book...... Euclid originally—"

“…… Euro ...... Reed originally? Repeating the name in a low voice, Jiang Shu's expression couldn't help but stiffen.

Don't...... At this time, or even earlier, Westerners already had the study of diagonals, lines, figures, etc.?

In the past, although she knew that geometry was transmitted from the West, she always thought that it was after the fall of the Qing Dynasty, and she never thought that it would be so early, so that she thought that there were other traversers here, and she was shocked in vain.

"How? Like? Without waiting for her to think about it, Zhu Changxun's eyes moved slightly, and he asked with a smile.

"Well," Jiang Shu was a little curious about how far the study of geometry had developed in the world in this era, and nodded heavily, "This metaphysics is a bit interesting, you have to bring me the rest of the volumes as well." ”

"Let's wait until the child is born," Zhu Changxun looked at her softly, "You are about to give birth now, so you should not be tired." ”

“…… It's okay," Jiang Shu had no intention of reading all the books in one go, smiled faintly, and said casually, "I don't know how many volumes there are in this set of "Geometric Originals"?" ”

"Six volumes, one volume each, that is, six volumes," Zhu Changxun said in a deep voice, "But I heard that it is not complete, so how many ...... Originally there were fifteen volumes, the last nine of which were not translated. ”

"Why?" Jiang Shu frowned and asked subconsciously.

"It is said that the compilation of Euclidean ...... Ricci originally proposed it to Matteo Ricci five years ago," Zhu Changxun paused and said, "It took the master and apprentice a year to translate the first six volumes, Xu Guangqi originally wanted to finish the next nine volumes in one go, but Matteo Ricci advocated that the first six volumes be engraved and put on the market first, and then see the reaction." ”

"Didn't you say that it was widely spread in the market in the capital back then? So why didn't you continue to translate it? Jiang Shu was a little puzzled.

"Just when they were about to continue translating, Xu Guangqi's father died suddenly, and he went back to his hometown Songjiang Mansion to go to Ding Wei to guard the system." Zhu Changxun sighed lightly.

"Four years ago, it was the thirty-fifth year of Wanli, and it took three years to keep filial piety, and the expiration of filial piety was last year," Jiang Shu counted with his fingers, and his face couldn't help but be surprised, "Mr. Li passed away on May 11 last year, that is, when he came back, Mr. Li had already passed away?" ”

"That's right," Zhu Changxun nodded, "He returned to Beijing in October last year to re-enter the Hanlin Academy." ”

"This is not Mr. Li, he can go and translate by himself!" Jiang Shu couldn't help frowning, "One person can't cooperate as smoothly as two people, but it's better to translate well and poorly than to give up halfway!" ”

"Don't forget, he is a person of the Ming Dynasty," Zhu Changxun looked at her with some amusement, "Although he worshipped Matteo Ricci as his teacher, he only learned astronomical phenomena, metaphysics, surveying, water conservancy and other things from him. ”

"That's-" Jiang Shu nodded understandingly, and raised the book in his hand to him, "This has already been given to me, you can go back quickly, there are clouds and cocos waiting here." ”

“…… It's good. It is inconvenient to stay here for more at this moment, Zhu Changxun was silent for a while, and nodded again with a smile.