Without signing any paper contract, Yang Feng agreed to Li Qiang's request and gladly accepted the remuneration standard of 20,000 yuan. On the way back, he was in a happy mood all the way, and felt that every cell in his body was happy: why is the city so beautiful, why is the sky so blue! Even when he sat on the bus, his heart was boiling with blood, and he felt proud of his ability. For people with weak abilities, pride makes people regress, and humility makes people progress, but for Yang Feng, the more things to be proud of, the more motivated he is to do them.

In order to accumulate more information about the development of single-chip microcomputer robots, Yang Feng selected 2 hours of books and bought 3 books on single-chip microcomputer development when passing by the bookstore. He knew that if he wanted to develop this program within 3 days, he had to learn the programming language in only 1 day to achieve the ability to call the MCU interface.

When I returned to school, it was already 10:35, and just after the end of class bell rang, I walked into the classroom against the flow of people and sat next to Wang Ziling. Wang Ziling heard that Yang Feng had a fever and a cold today, and he was very worried, thinking about a lot of things in the morning, thinking that Yang Feng had unlocked the function curve on the bookmark yesterday and learned her mind, and he didn't want to see her again, so he didn't come to class. But seeing that Yang Feng was in a good mood, Wang Ziling was still not very relieved, and put the back of his hand on Yang Feng's forehead, and found that Yang Feng was not having a fever, so he breathed a long sigh of relief and said, "It's great that you are not sick!", and the watery eyes flashed with joy.

"Wang Dasha, you know no, I took a big order. Look, what is this. Wang Ziling looked down at the books Yang Feng was holding in his hand: "C51 MCU Development Practice", "Introduction to C Language", "MCU Robot Cybernetics", took it and looked at it twice, all of which were content she couldn't understand, and in an instant, Yang Feng's technical worship suddenly appeared.

Before Wang Ziling finished worshipping, Yang Feng said proudly: "I am challenging an unaccomplishable goal, and in 3 days, I will start from 0 to make a small robot orbit finding program." 20,000 yuan. ”

Wang Ziling covered her mouth in surprise and said, "Oh my God! 20,000 yuan." Tell me, what's going on with this robot?"

Yang Feng coughed twice, cleared his throat, and said in a positive (eighth) scripture (Dao): "Well, it is to let a machine have a soul, as long as people let it go, it can go wherever it goes." ”

- "It's amazing, it's so cutting-edge!"

"Actually, to put it bluntly, this robot has a sensor that can scan black lines on the ground. If you draw a line on a white floor with a black whiteboard marker, the robot will automatically follow the line. Yang Feng's affection became like that of a teacher, trying to make Wang Ziling fully understand the goal of the project.

- "What's the point of having a machine walk on the ground?"

This question stopped Yang Feng, in fact, he didn't know what the practical use of the robot was after it was realized: "I really don't know this, it's what a professor wants, and I don't know what the use is." ”

This sentence made Wang Ziling's worship of Yang Feng even more escalated, you must know that a high school student helps a professor make things, this matter is a legendary story everywhere.

Suddenly, the class bell rang, this class is a physics class, Yang Feng has already learned all the subjects from the first to the third year of high school, and he is not fully interested in the content of the physics teacher, so he turned over the three books he had just bought, began to study them, and put the notes on the table, and copied the keywords to the notes when he encountered something he didn't understand. Soon, 20 minutes had passed in the class, and Yang Feng had already quickly read the book in C language, and after reading it, he sighed in his heart: It turns out that there are so many differences between C language and VC++, and C, C++ and VC++ are not the same language at all! As soon as I closed the book, I felt that I was still unsatisfied, so I opened it again, looked carefully at the places that I had not fully understood before, and kept crossing out the keywords that had been written on the notes and filling in new keywords.

Wang Ziling looked at Yang Feng's serious reading expression, and he didn't want to listen to the lecture, so he lay on the table and pretended to fall asleep, in fact, he was squinting his eyes and secretly looking at Yang Feng, what caught his eye was Yang Feng's slender and straight figure, handsome facial contours without losing the cuteness of a teenager, broad shoulders, a fair neck, thick eyebrows, and eyes as deep as the night sky. While looking at him, his mind kept thinking about all the things about Yang Feng. At this time, Yang Feng occasionally frowned and occasionally smiled, in Wang Ziling's opinion, this picture was very beautiful. Yang Feng read the book carefully, not aware of Wang Ziling's gentle and confused eyes and lovely smile.

At the end of class, Yang Feng finished reading the entire C language tutorial, feeling that this lesson, his mind was spinning rapidly, more than 300 pages were already clear in his heart, and he looked up at the blackboard, as if he was in a different world. He picked up the bookmark given by Wang Ziling yesterday and sandwiched it in the book about memory allocation and pointers, which is also the most difficult part of the whole book, for next reference.

Wang Ziling watched Yang Feng put down the book, remembering the "Harvard dream" that Yang Feng said yesterday, and couldn't help but worry about what to do if the person he liked so much was not in the same school as him, and he might never see Yang Feng again in the future. So he asked: "What if my family doesn't let me apply for Harvard?", Wang Ziling didn't want to reveal more information about his family's lack of wealth, and tried his best to whitewash himself in front of his beloved, eager to get that person's attention.

Yang Feng was stunned for a moment, frowned and said, "Brother, I will go wherever you go." If you really can't go to Harvard, you will definitely be fine with your grades to apply for Tsinghua University. Do you not have confidence in your grades? I guess you little fool will have to repeat your studies, and I will wait for you at Tsinghua University. Although it was Yang Feng's dream to go to school in the United States, he thought that Wang Ziling could not go to school in the United States, so he no longer insisted that he must go there. Yang Feng didn't know that in his own heart, he had long been unable to leave Wang Ziling.

Wang Ziling looked at Yang Feng's firm eyes, nodded and said:

……

"Then let's agree to be at Tsinghua University. ”

……

Yang Feng saw Wang Ziling's serious face, so he agreed. Who would have thought that this promise would be fulfilled many years later, of course, that's all for later.

The bell rang after class, Yang Feng was about to go to the cafeteria, and the sports committee of the class ran over, stopped Yang Feng in the corridor and said, "When I was training just now, guess who I saw?"

- "Who?"

"The owner of the super pleasure Internet café, he is standing at the gate of the school, saying that he brought money, and he has to hand over the money to you, go quickly!"

- "Okay! Thank you!", Yang Feng listened, and quickly ran towards the school gate.