Xin Zhai

There is a training trail along the Swan River that stretches for miles.The plastic pavement has a river on one side and lawns and green belts on the other.Ye Li would run here after class in the afternoon.When I ran to the east side of the river, I could see black swans in the street park on the side of the road.In the middle, there is a community football field, where Wang Xin, David and a few classmates will play football at [-]:[-] pm.On the west side of the river, there is a pier.A line of white sailboats lined up neatly on the pier.There are several restaurants by the pier, and flocks of seagulls hover over the restaurants, making "quack quack" calls.Then one day, Ye Li suddenly realized why the coastal path in University A was called "Laughing Gull Road", because the seagulls sounded like people laughing.It's just that University A doesn't have so many seagulls, so he never figured it out.

Among the teachers who taught Ye Li, Peter was regarded as one of the most respected.He is about in his early fifties, and he is energetic, but he has few hairs left, and his belly is big and round, and he wobbles when he walks.But Peter is very funny and humorous. His laboratory is almost the best in the department, and many achievements in the department come from him.

In the second month here, Peter found a class time and took them to visit his laboratory. Peter's laboratory has several rooms, the largest one is very spacious, and there is actually a small car parked on the ground.He explained that this is a cooperative project with the Department of Materials to test the material properties of tires.

In one of the laboratories, Ye Li accidentally discovered a small robot.Or something like a car, but there is another pick-up structure on the car, which can complete some actions.

Ye Li asked Peter what it was and could he demonstrate it.

"You can call it a robot, and it can complete some tasks in dangerous or extreme environments. It is still in the debugging stage." After Peter finished speaking, he really turned on the entire system.Ye Li watched the mechanism move, rotate, move, and pick up. Although the structure and purpose were different, the speed of movement was much faster than the mechanical arm that Tong Yan led him to make!

He looked around the little robot for a long time, and found that there seemed to be two motors installed at the joints of each movable part.

"Are these two motors? Can they be synchronized? Why is it set up like this?"

Peter smiled and said that this is also their optimized design, and it really needs some feedback system to adjust.Ye Li still wanted to ask further questions, but Peter had already started to introduce other things, so he didn't speak again.

"Dual motors?" Tong Yan was also very surprised when he heard it, "Are you sure you saw it clearly?"

"See clearly." Ye Li played football with them for more than an hour this afternoon, and it was almost 7 o'clock when he came back, and he didn't eat until 8:[-].

"I also asked Peter, and he said it was two motors."

Tong Yan saw that he was carrying a big plate, and was purring into his mouth, and asked, "What are you eating? It's so delicious."

"Tomato beef brisket mixed with rice." Ye Li said while eating, "Beef brisket bought in a Chinese supermarket."

"Oh. Did you take a picture?"

"No, I didn't dare to shoot. Then I asked him to demonstrate it, and he opened it. I think the action is fast."

"Really?"

"Ah."

Tong Yan was thinking about it, when he saw the screen on his phone, he suddenly stretched out a can of beer and stuck it on Ye Li's face.

"Ah!" Ye Li was startled, turned around and saw David smiling at him with a beer.

"Would you like a drink?" David's common words and tone of voice were different from theirs, and it sounded nice.

Ye Li chuckled: "Yes! Did you buy it today?"

"That's right, I'm going to celebrate Xinxin's birthday in two days, so I bought several kinds."

Ye Li took the beer over and looked at it: "I like to drink this."

"Got it. I bought a box for you!"

"Hey, thank you." Ye Li opened the beer, took two sips, and the Adam's apple on his neck went up and down.

David just walked out, turned back, leaned on the door frame and said, "Little Li?"

"what?"

"I'm going to eat beef curry tomorrow."

"it is good."

Tong Yan watched him finish talking with his roommate, and ate everything on the plate like a storm, picked up the beer, took a few sips, and then wiped his mouth contentedly.

He remembered that time when he went camping with the students, Ye Li also happily did a lot of things for everyone, that was before those things happened to him and himself.

"What did you say just now?"

Tong Yan said: "Let me do some more research and check if there are any papers on the application of dual motors."

"Well, I'll go to the library here to look it up when I have time." Ye Li thought for a while, "But I still think it's more convenient to get some materials from Peter, so I can get close to him later."

"Hehe, you're so capable." Tong Yan asked, "How did you get close to your teacher? Let me hear."

Ye Li held his chin and rolled his eyes: "There are many ways. For example, invite him to eat at home? Or... run errands for him, do chores, give him some small gifts?"

Listening to him, Tong Yan felt weird.

"Anyway, I just got to know him first, and then try to find a way to sneak into his laboratory." After finishing speaking, seeing Tong Yan didn't respond, Ye Li asked, "What do you think? Is there a good chance?"

Tong Yan smiled wryly in his heart, which teacher doesn't like a student like him?

"I don't know, let's try it," he said.

Afterwards, Ye Li carefully observed Peter's usual schedule and habits, and found that every time he came to teach them, he always brought a cup of coffee from the school's cafeteria.One day he was waiting for him on the road and bought it for him in advance.When buying it, Ye Li thought that if a cup of coffee costs more than 20 yuan, it should be regarded as an investment.

In this way, there are two classes a week, and Ye Li has to spend 50 yuan to buy coffee and invite him to eat at home.When getting along with foreigners, the first thing is to call them differently. You can call them by their first names, which saves you the trouble of removing the word "teacher" in the future.

Later, Peter came to class once and arranged experiments for the course, which were routine tests of some circuits and systems.Ye Li took the opportunity to say that he had done many similar things, and asked him if there were any projects in his laboratory that he could participate in, and he could help with them.

Peter welcomes him to come and play.The things done by the Department of Automation are very interesting. For example, the racing project is a group of master and doctoral students who are working on it all day long, and they drive the racing car to the school every now and then, which attracts a lot of attention, and even many students from other majors Will often visit the laboratory.Ye Li felt relieved when he heard his words, and planned to get a little more familiar with the brothers and sisters in the laboratory.

As a result, since Ye Li discovered that Peter's project has something to learn from, he often goes to the library after dinner.Because the database can only be accessed through the school's network, and he found that the school's database is so huge that not only Australia, but also the papers of many universities in Europe and the United States can be read.In addition to the things in the Department of Automatic Control, there are also many references in the database for the static electricity test he conducted in the Institute of Electrostatic Research last semester.

Ye Li was like a fish that entered the sea, only then did he realize how big the world is.The technical boundaries he thought before have actually been studied by many people.

After Ye Li came to Macao, he and Tong Yan basically kept the video frequency once a week.Because the papers were all read online, it took him a while to get used to reading English literature, so he spent every night in the library, forgetting to eat and sleep, and only sent text messages with Tong Yan.

"I just found a few papers, which may be useful, sorted them out, and sent them to your email."

"Oh."

"Did you read those a few days ago?"

"Look, it's not very useful."

"Oh."

After more than half an hour, Ye Li asked again: "Have you seen it? Are you interested? I think there are many similar ones."

"I didn't watch it, I'm in the dormitory, I'll watch it tomorrow."

Ye Li looked at his watch. At eight o'clock, Tong Yan returned to the dormitory?

He put down the phone and continued to stare at the screen when the phone rang suddenly.His first reaction was Tong Yan, and he felt a little happy in his heart.You must know that he has been in Australia for so long, but Tong Yan has never taken the initiative to video with him.As a result, Ye Li picked it up and saw that it was Su Xiaoqian's voice call.

He walked out of the reading room clutching his phone, and answered the phone in the corner of the corridor.

"Xiaoqian? How are you doing recently?"

"It's okay, how about you?" Su Xiaoqian's voice was very low, and Ye Li didn't know if the internet was not good.

"I'm fine, I've been a little busy recently." Ye Li asked, "Are you in the dormitory? How are those two?"

"They're still the same. I'm not in the dormitory, I'm at home."

Today is the middle of the week, why isn't Su Xiaoqian at school?

"Why didn't you go to school?" he asked.

Now from Su Xiaoqian's tone, Ye Li heard that he was depressed: "My mother was ill last week and stayed in the hospital for a few days."

"Ah? What's wrong?"

"I had heart palpitations once. Because my dad died of a heart attack, I was very scared and took her to the hospital for an examination. Nothing was found that day. The doctor told us to come back. I didn't agree, so I waited for two more days. A cardiac angiography was performed, but nothing was found."

"Oh, then why the palpitations?"

"Hey, many heart problems are like this. Usually nothing can be found out, but when a disease occurs, it will kill people. It's not that my mother didn't take my father to have it checked."

Ye Li didn't know how to comfort her, and said, "Then, you should pay more attention and make her less excited."

There was a long silence on the other end of the phone, before Su Xiaoqian's stumbling voice came over: "Ye Li, my mother, she's getting palpitations only after she knows about A Gu and me."

Ye Li was too shocked to speak, or he didn't know what to say.

"I, really don't know what to do..."

"Xiaoqian, don't worry...she will accept it slowly, as long as the two of you don't give up." Ye Li was a little panicked, and subconsciously said some scene words that didn't have to be thought of at this time, and then bought him some time so that he could think about it as soon as possible. Come out and say something that can really help Su Xiaoqian.

"I don't think...she will accept it...it will never be possible...besides, I don't dare to talk about it now."

Su Xiaoqian's words cut off all his positive thoughts.

Only those who have lost their father know how heavy the word "mother" is to a child, especially an only child. It means the source of the last bit of family affection and an inescapable responsibility.It's so heavy that you can't make any outliers, not even rebellious imaginations.

That's right, even if there is any possibility between him and Tong Yan, his mother is a mountain that he will never be able to cross.