If I ask you to set up a stall, why do you always run to deserted places?

Liu Xiang ultimately stayed.

Come here.

He was genuinely curious.

What kind of magic does this food possess?

Can someone be so charming that all the students in the class are completely mesmerized?

After waiting in line for about half an hour, I finally got to the front of the window.

Liu Xiang quickly scanned the menu.

"Tomato beef brisket, garlic pork ribs, and golden broth beef."

"Wow, that's great! So many dishes!"

Liu Xiang muttered something to himself and peeked into the window.

"Huh, there's only one person?"

Liu Xiang couldn't help but wonder, "Is this coach able to handle all the work?"

"We can definitely handle it!"

Just then.

Zhao Ziliang came over to add some food to the meal.

Their eyes lit up when they saw Liu Xiang.

"Teacher, you're eating too?"

"Uh-huh."

Liu Xiang coughed twice, looking a little embarrassed.

This was the first time he had ever lined up with students for lunch.

"Then you're in luck!"

Zhao Ziliang chuckled, "This boss is notoriously ruthless!"

"Not only is the food served quickly, but it's also incredibly delicious!"

"I guarantee you'll crave your mom after just one bite!"

"What? That's so exaggerated?"

Liu Xiang looked at him in surprise.

Did she call out in surprise, "Mom?"

Why doesn't he believe it?

"Hey, I have to go now, my extra rice is ready, I have to go. Enjoy your meal, Teacher Liu!"

Zhao Ziliang took off running.

Liu Xiang shook his head as he watched his retreating figure.

Then I read the menu from beginning to end, and finally stopped at a name.

Braised pork trotters with soybeans.

"This is fine! Please give me a generous amount of rice, thank you!"

"Okay!"

Su Yun got him food.

Ten seconds later.

Liu Xiang was holding a plate, and he felt it was getting heavy in his hands.

"Isn't this a bit too heavy?"

He casually found a corner to sit down.

He carefully examined the food on his plate.

You know what, it looks really good!

The pig's trotters were stewed until they were glistening with oil.

The skin and flesh were still trembling slightly.

The soybeans, having absorbed the broth, are placed on top of the rice, making them plump and round.

"It's better than I expected!"

Liu Xiang couldn't help but poke it with his chopsticks, then exclaimed in admiration.

"I just wonder how it tastes?"

Liu Xiang was about to pick up a piece of pig's trotter and try it.

"The night gave me black eyes, but I..."

The phone suddenly rang.

"Who is it calling at this hour?"

Liu Xiang took it out and glanced at it.

Got it!

It turned out to be his former colleague, Lao Zhou!

He didn't even need to answer to know what they were there for.

"crooked?"

"Hey, Lao Liu, what are you doing?"

"Eating."

"Eating? You can still eat? I was asking how your research project is going!"

Old Zhou sounded very anxious.

Before Liu Xiang could say anything, he started talking to himself.

"Do you know that my superiors are pressuring me again?"

"Are you even capable of handling this?"

"Is a simple equation problem really that difficult?! It's been dragging on for over two months!"

"Old Zhou, listen to me."

Liu Xiang moved the phone a little further away.

"I know you're in a hurry, but don't rush."

"Haven't I been thinking about this all along?"

"Have you been thinking about this?"

"Old Liu, if you keep thinking about this, the opportunity will be lost!"

Old Zhou questioned.

"Our entire project is stuck at this step!"

"If we can't pay next month, we'll lose all our funds! You'd better think this through!"

"Old Zhou."

Liu Xiang's voice sounded even more helpless.

Do you think I don't want to solve the problem?

"I've looked at that system of equations at least two hundred times, but I can't find any analytical solution at all."

"Then why don't you try numerical methods?"

Old Zhou asked.

"Numerical methods?"

Liu Xiang almost burst out laughing.

"You make it sound so easy. You're not unaware of the peculiarity of that condition."

"It simply cannot converge using conventional numerical methods."

"The calculated data is all garbage."

There was a two-second silence on the other end of the phone.

Liu Xiang knew that Lao Zhou was forced into a corner, otherwise he wouldn't have been urging him so much.

But does Liu Xiang have a solution?

There isn't one at all.

Mathematics really does require talent.

When you encounter a problem you can't solve, no matter how hard you try, there's nothing you can do.

"Old Liu."

Old Zhou changed his strategy and patiently persuaded him.

"Why don't you take a two-day break and stop teaching?"

"Maybe a change of environment will help me find my way of thinking?"

"Looking for a solution?"

Liu Xiang gave a wry smile.

"If finding a solution were so easy, I wouldn't have been struggling with this headache for over half a year."

"Alright, alright."

"I'll hang up now, I'm going to eat."

".....Okay, you can eat first."

"But I'm telling you, this can't be delayed any longer!"

"If you don't make any progress on that equation, our entire group will have to be laid off!"

The call ended immediately after the conversation.

Liu Xiang stared at his phone in silence for a long while before slowly putting it down.

He let out a long breath.

This issue has been troubling him for more than half a year.

It's been going on since last winter until now.

I originally thought it would only take a few months to complete.

Unexpectedly, the boundary condition problem was like a wall, firmly blocking his way!

Liu Xiang used every method he could think of.

Whether it's transformation, iteration, or approximation.

They all hit a wall.

"This is difficult!"

Liu Xiang sighed.

These past few months.

He hasn't had a good night's sleep in a single day, and his hair is falling out in clumps.

Even when using my phone, I'm not paying attention.

Liu Xiang glanced down at the braised pork trotters with soybeans in the bowl.

Suddenly, I felt a sense of emptiness and boredom.

I've lost my appetite.

He casually picked up a piece of pig's trotter and stuffed it into his mouth.

I figured I'd just grab a couple of bites and head back.

The moment the teeth bit down...

"???"

Liu Xiang paused slightly.

"This pig's trotter..."

The pig's trotters were stewed to perfection, the skin was incredibly soft and tender, and each bite was rich in collagen without being sticky.

"It smells so good!"

He couldn't help but exclaim in admiration, then took another big bite of soybeans.

"Wow!"

These soybeans are so soft and tender!

Each one is soaked in meat juices.

When you bite it open.

The warm broth seeped out from the beans, filling his mouth with the aroma of beans.

Liu Xiang picked up another piece of pig's trotter, subconsciously dipping it in a little more broth.

Take a big, hard bite.

"Cool!"

......

This meal took about half an hour.

Liu Xiang was sporting a large pregnant belly.

I felt an unprecedented sense of exhilaration.

As for the topic and the equation.

Go to hell with them!

Just as he was about to put the plate down.

Inside the brain.

A vague idea suddenly came to mind.

There were no warning signs, no prelude.

It just popped out like that.

"what?"

"What's going on?"

Liu Xiang was instantly dumbfounded.

"This thought... seems to have something to do with that damn boundary condition?"

"How...how is this possible?"

Liu Xiang muttered to himself.

Although this idea is not yet clear.

But he could clearly sense it.

This line of thinking is completely different from what he had thought before!

It's like... a completely different perspective!

Correct!

Cut straight in from another direction!

Simple and rude!

But somehow it's also incredibly efficient!

"No way?"

Liu Xiang put down the plate and quickened his pace as he walked into the office.

My heart was beating faster and faster.

After arriving at the office.

Liu Xiang slammed his bag on the table, not even having time to turn on his computer.

He immediately grabbed a handful of draft paper and a pen.

Then I quickly started writing.

Liu Xiang had looked at the equations on the draft paper hundreds of times.

It can be said that he knows every single formula by heart.

But this time.

When he looked up again!

That vague idea actually started to become clear!

"Holy crap!"

"What's wrong with me?!"

Liu Xiang quickly scribbled.

"This step is wrong!"

"This step is wrong too!"

"That should be it!"

"..."

"If we disregard the limitations of boundary conditions, first consider the properties of the internal solutions, and then use asymptotic matching to reverse-engineer the boundaries."

"......"

"hiss!"

"Although it looks awkward, introducing a correction term might be able to suppress the singularity."

"..."

Holy crap!

Liu Xiang's pen moved faster and faster as he wrote.

Line after line.

My mind was clearer than ever before.

"It seems like it might actually work!"

Liu Xiang's breathing gradually became rapid.

"Holy crap! No way!"

"Really?!"