Yuyao County, Beicheng, East Street, Chapel.

Seeing Wang and Yao coming in, López stepped forward and grabbed him.

"Wang Heyao, tell me quickly, what kind of discipline is chemistry you are talking about?"

"Chemistry is the science of internal changes in objects. For example, when limestone is calcined, quicklime and carbon dioxide are formed, which is a chemical change. Another example is when iron is smelted, lime is added to remove phosphorus and silica to produce high-purity steel, which is a chemical reaction. ”

Wang Heyao's words made López stunned, and he quickly took out a stack of papers and put it on the table.

"Wang Heyao, you say slow down, I'll remember it."

"Father, you don't have to be in a hurry."

Wang Heyao looked at López and rolled his eyes.

"Priest, I heard that your priest Tessie is very knowledgeable, the unity of knowledge and action, in addition to the scientific knowledge in the book, even bird guns can be built, it is really amazing!"

Wang Heyao smiled and gave a thumbs up.

López was stunned for a moment, put down the pen and paper, and smiled slightly.

"Wang Heyao, you're not here to borrow books and talk about scientific knowledge, are you?"

"Father, of course. Let's talk about math! ”

Wang Heyao scolded secretly in his heart. This greasy middle-aged foreign devil is really not easy to take the bait.

"Math?"

López was stunned for a moment, and immediately became interested.

"Wang Heyao, have you gained anything from reading books in the past few days?"

When Sun Jiachun and Zhao Guohao entered the church, Wang Heyao was arguing with López, a missionary from France, in front of the statue of Jesus.

"Father, is there a solution to the quadratic equation 3x2+5x-2=0, in fact, you don't need to use all your strength to solve it, you just need to draw a figure in the Cartesian coordinate system! Look at ...... like this."

Wang Heyao said, took the brush and began to draw on the paper.

"This is a Cartesian coordinate system, when x=0, y=-2, the opening is upward, the parabola must have an intersection point with the x-axis, there must be a solution, and it is two different solutions. If there is only one solution, the parabola can only be like this......"

Finally finished painting, there were several black bumps, Wang Heyao shook his head.

If only you had a pencil and a ballpoint pen, or a fountain pen.

Perhaps if the research is successful, we will be able to get out of the current economic predicament.

"Heyao, you ......"

Sun Jiachun was sweating profusely, his eyes widened and he wanted to get angry, but he was stopped by Zhao Guohao.

Wang Heyao did this, and he had his own reasons.

Wang Heyao waved his hand, signaling the two to be restless.

"Wang, you are truly a great mathematical genius, comparable to my teacher, Master Descartes!"

López took the drawings and was fascinated.

More than thirty years ago, Descartes invented one of the fundamental tools of modern mathematics, the coordinate system, combining geometry and algebra to create analytic geometry. At the same time, he also deduced geometric formulas such as Descartes' theorem, and was a well-known master in Tessie.

"Descartes!"

Wang Heyao said modestly:

"Father, you're exalting me too much. I'm just a lover of mathematics, and I'm a hundred and eight thousand miles away from Descartes. ”

Who Descartes was, he had no impression of whatever. He is a layman, just picking up the wisdom of his predecessors.

"You Orientals are very smart, but your cleverness is used to be officials. Your Gao County Commander is very knowledgeable and has some insights in mathematics, which is rare. These two are your friends? ”

López said, his eyes swept to Sun Jiachun and Zhao Guohao next to him.

"Father, let me introduce you, these two are my friends, both lovers of arithmetic and geometry."

Wang Heyao introduced Sun Jiachun and Zhao Guohao, and continued to ask with a smile:

"Then my level is higher than that of the high county order?"

Sun Jiachun and Zhao Guohao's ears suddenly stood up.

It seems that Wang Heyao is not untargeted.

"Tall is more solid than you, but obviously you are much more knowledgeable. For example, if this coordinate system solves a quadratic equation, Mr. Gao and I can obviously only be your husband. ”

Adhering to the philosophy of Matteo Ricci, the missionary sage of Tessie, "missionary first and learning first", López is also dressed in a Han robe, and he is fluent in Hangzhou dialect, but he has no braids on his head.

The Tessie missionaries were very knowledgeable, and many of them were as talented as scientists. For example, López, who graduated from the oldest and most prestigious Poitier University in France and even Ctessy, is also a well-known scholar in Ctessy.

López himself majored in theology, but at the same time he was proficient in mathematics and medicine. He is no stranger to Wang Heyao.

Wang Heyao came to the church to borrow mathematical classics, and out of the missionary enthusiasm, he asked Wang Heyao to borrow books, who knew that in just one afternoon, he was amazed by the erudition and innovation of the young man.

This is simply comparable to the mathematical genius of Archimedes and Descartes!

He's here, aren't you sure he's showing off?

"I heard that Master Gao is very accomplished in arithmetic, and I really hope to have the opportunity to learn from him."

Wang Heyao intentionally or unintentionally, Sun Jiachun and Zhao Guohao's eyes looked at Lopez together.

"Master Gao is very fascinated by arithmetic, and he also has his own writings, so he should be happy to discuss them with you."

López was smiling and stern.

The official is the official, the people are the people, and the hierarchy is strict, and he seems to hear the voice of Wang Heyao's words. After coming to the East for many years, he has also become accustomed to the twists and turns of the Easterners.

Oriental people are all crooked, talking clouds and mountains and fog, who knows if Wang Heyao has ulterior motives to improve his family work?

"Father, how many years have you been in my East?"

Wang and Yao changed the topic and pulled to López.

"Time flies! I have been Kangxi for three years, and it has been a full 10 years! The great Age of Sail, the great navigators, it was their galleons that brought me to this great country of the East! ”

López couldn't help but sigh.

"What a great navigator, just a bunch of robbers. burning, killing, looting, raping. Plunder, the so-called Age of Discovery, is nothing more than a criminal history of plundering and colonization by your Tessie robbers. ”

Wang Heyao smiled and scolded López.

"I disagree with you, King. At least we came to the East and brought Western civilization to the East. Your opinion is too extreme! ”

López blushed and shook his head in embarrassment.

"The natural sciences of the West are ahead of the East. But your so-called Western civilization has too much dross and too much poison. If nothing else, religious persecution, persecution and discrimination against foreign races will not be fake. ”

Wang Heyao was unceremonious.

He didn't want to help, and he didn't mind nausing the other party.

López was speechless for a moment.

In the 17th century, the entire European continent was religious. During the persecution, many scientific and technological talents with inventions and creations were punished. At the same time, France was in the middle of a series of wars, and Italy was torn apart, which caused scientific and technological talents from the European continent to flow to the British Isles, which were relatively stable on the edge of Europe.

"Father, my friend has come to me and taken his leave."

Wang Heyao and López smiled goodbye.

"Wang, do you want to join the religion?"

López blocked Wang and Yao. He never forgot his glorious missionary career.

"Father, we are interested in learning about Western religions and civilizations, but we don't have time right now."

Wang Heyao politely refused, and his eyes rolled.

"But I want to ask again, do you make firearms?"

"Bring with you, the king, the book you are going to borrow. I hope you will come often, let's have a good discussion of math problems! ”

López avoided talking about it, but his last sentence was sincere.