Jiang Shu watched him step on the steps of the corridor above the ground, walked into the hall door, was supported by Yun Lingling, took a few steps outward, looked at him with a smile and said, "Don't you still want to go to the Prime Minister's Mansion to attend the wedding of the eldest brother, why did you come here at this time?" ”

"Didn't Ping Qian just leave, it's still early, let's come and see you." Zhu Changxun walked closer with a light smile, waved his hand to signal Yun Lingling to step back, and raised his hand to support her.

"What do I have to look at," Jiang Shu gently stroked his high bulging lower abdomen with his other hand, "This kid is getting heavier and heavier, and he is tired every day, and his complexion is much worse!" ”

“…… Shu'er, thank you for your hard work. Zhu Changxun's hands holding her tightened slightly, and then he immediately restrained his expression, and said with some apologies.

Jiang Shu slowly shook his head and turned his head to look at him: "Who called him our child, don't you have to be like this to be a mother!" Okay, you've seen it here, go back quickly, get ready, and go out early. ”

"Don't worry, I have one more thing to give you." Facing her clear eyes, Zhu Changxun's tone was soft and authentic.

"Oh? What is it? Jiang Shu asked with some curiosity.

"Don't you like to read? When I was looking for the book of "Mengxi Writings" by Shen Kuo of the Song Dynasty in the book pavilion last night, I happened to see a set of interesting metaphysical books from a few years ago, so I specially took it out for you. Zhu Changxun smiled faintly, withdrew his hand and let go of her, took out a dark blue front and back cover booklet from his arms and held it to her, "But I'm afraid that you will be tired, so I only brought one book over to let you pass the time." ”

"...... Geometry Primitive?" Raising his hand to take it, his eyes fell on the four neat ink-colored characters on the cover, and Jiang Shu only felt a shock in his heart.

"What's wrong? What's wrong? Seeing her reaction, Zhu Changxun's eyes moved slightly, and he asked tentatively.

Jiang Shu did not answer, quickly opened the booklet, and took a cursory look, only to see that all kinds of patterns and graphics were clearly drawn on it, as well as words such as triangles, parallel lines, circumferential angles, congruence, and similarity.

But isn't that something that only modern mathematics has? How did it appear in ......

Could it be ......

In addition to myself, there are other people here who have traveled from modern times......

"What's wrong?" After waiting for a while, unable to wait for her response, Zhu Changxun asked again.

"I didn't ...... Not much? Afraid that he would find out something, Jiang Shu quickly shook his head.

After a pause, she tried to calm herself, closed the book in her hand, and carefully held it up to him: "This set of books...... Where did it come from? ”

"Chang Hao ordered someone to send it four years ago," Zhu Changxun said in a deep voice, "It's the year when my father-in-law was promoted to the cabinet and your family just moved from Nanjing." It is said that it was widely spread in the capital at that time, but I wonder if my father-in-law has seen it. ”

"This ...... I don't know," Jiang Shu forcibly suppressed the shock in his heart and said, "Daddy, what books he reads, he will only occasionally talk to the eldest brother and Brother Fengzhi, and he will never tell our daughters." ”

"That's right," Zhu Changxun stared at her, "After all, in the eyes of most people, it is useless for my daughter's family to study." ”

"That's it," Jiang Shu immediately nodded in agreement, looked down at the book in his hand again, and saw that there was no author's signature on it, and said, "That's ...... Do you know who wrote it? ”