Chen Jingyan: "???"

Did this old man break his brain?

Shen Jingyan pinched her cheek: "Grandpa, take a good look, I'm a girl!"

The old man acted as if he hadn't heard her, and kept repeating, "You look like my son! Your forehead, nose, and chin are all the same!"

A voice came from among the onlookers: "Look, this little girl has been latched onto by the old man!"

Shen Jingyan ignored the whispers, brushed the dust off the old man's clothes, and asked with concern:

"Sir, are you able to walk?"

The old man nodded groggily and took a step or two, but he walked unsteadily.

Shen Jingyan looked down and saw that the old man's shoes were worn out, with his toes showing. Heaven knows how far the old man had walked in those shoes!

"Sir, you have a head injury. Let me take you to the clinic for a checkup!"

The old man held Shen Jingyan's hand tightly and nodded obediently: "Okay, okay."

Under the watchful eyes of everyone, Shen Jingyan helped the old man onto the tricycle.

The old man sat down in the back of the truck, took out a pair of reading glasses from his pocket, put them on, and carefully examined Shen Jingyan.

"I'm not seeing things, you really do look like my son!"

The old man nodded to himself in confirmation.

Shen Jingyan noticed that the old man's reading glasses had gold frames, and although he was dirty all over, only his glasses were clean.

Gold-rimmed glasses are not something an old farmer can afford!

Shen Jingyan observed the old man more carefully. After putting on his reading glasses, his eyes became much clearer and brighter. Although his hair was gray and his face was full of wrinkles, it did not hide his refined and handsome temperament.

Chen Jingyan thought to himself, "This old man must be a cultured man, and he must have been very handsome when he was young."

Upon arriving at the town's health center, Shen Jingyan led the old man through several examinations.

The doctor said the head injury was an external injury and nothing serious; it would heal after a few days of applying medicine.

What's troubling is that the old man seems to have a severe case of Alzheimer's disease, and he doesn't know anything when asked.

He didn't know where he came from, where his home was, or why he had inexplicably appeared in a strange town. He also had no identification documents on him.

The only thing the old man remembered was that his surname was Xu.

But there are so many people with the surname Xu in the whole country. Trying to find his family based on just one surname is like looking for a needle in a haystack.

Shen Jingyan wanted to take the old man to the police station, but the old man shook his head vigorously as soon as he heard the word, gripping Shen Jingyan's arm tightly and refusing to let go, just like a little kid who can't leave his mother.

In fact, Shen Jingyan was also worried about leaving the old man at the police station. In his current condition, he couldn't provide any clues to go home, and the internet was not very developed in this era. She was afraid that he might stay at the police station for several years and still not be able to find his family.

After much deliberation, Shen Jingyan took the old man back to the forest farm.

As soon as they returned to the forest farm, the educated youth surrounded the old man as if he were a monkey show.

Old Xu was the one who chased them away.

"Go study! Do you still want to go to college?"

Old Xu looked at this old man, Xu, who was about the same age as him, and felt quite friendly towards him. He even solemnly stepped forward and shook hands with him.

Old Xu chuckled and said, "Young man, you were a soldier when you were young, weren't you? You haven't put down your gun yet, have you?"

Old Xu was taken aback and asked in surprise, "Brother, how did you know?"

Old Xu pointed to his hand and said, "When you shook hands with me, I felt the calluses on your hand. I could tell from the location of the calluses that you've always been holding a gun."

Old Xu glanced at Shen Jingyan in surprise: "Jingya, you said he has Alzheimer's, but he doesn't seem like it at all!"

Old Xu muttered unhappily, "So what if I have Alzheimer's? Alzheimer's doesn't affect my IQ!"

He smiled and said, "Yes, yes, you are a clever but silly old man."

Old Xu adjusted his glasses and said, "Jingya, when you smile, you look like my son, but even more like my daughter-in-law!"

Old Xu laughed and said, "Jingya, this old man keeps saying you look like his son and then his daughter-in-law. Is he trying to adopt you as his granddaughter?"

Old Xu rubbed his rumbling stomach: "Good granddaughter, Grandpa is hungry. Aren't you going to cook Grandpa a meal?"

Chen Jingyan: "..."

She suspected that the old man was pretending to be stupid to deceive her!

Since I've chosen to be a good person, I can only see it through to the end.

Shen Jingyan led Old Man Xu to the dormitory, prepared water for him to wash his face, and used her points to redeem a new set of clothes and shoes for him.

After tidying himself up, Old Man Xu came out looking like a completely different person.

Not only did he become more radiant, but his posture also became more upright, and his smile was both kind and handsome. Every gesture he made was refined and elegant, just like a university professor or a bigwig in a research institute.

This made Shen Jingyan even more certain that Old Man Xu's identity was by no means ordinary.

"My dear granddaughter, when are we eating? I'm starving!"

Old Xu and Shen Jingyan acted as if they were old friends. They sat on the kang (a heated brick bed) and started eating peanuts and dates. The way he sat cross-legged on the kang was just like he was on his own kang at home.

Shen Jingyan poured him a cup of tea and then went to the kitchen to cook.

When she finished cooking and put the meal on the table, Old Man Xu was engrossed in writing and drawing on a pile of manuscript paper, and his fountain pen was almost out of ink.

As soon as Old Xu smelled the aroma of food, he immediately threw down his manuscript, grabbed a steamed bun, and stuffed it into his mouth.

"It smells so good!"

"Grandpa, what's wrong...?"

Shen Jingyan picked up a stack of manuscript paper next to Old Man Xu and found that it was a set of quadratic equation calculation problems that Gu Zhiyun had given her. The difference was that there were more than 30 additional problems after Gu Zhiyun's problems, all about quadratic equations, but the problems were much more difficult, and there were even some word problems!

As he stuffed a steamed bun into his mouth, Old Xu said, "Granddaughter, I saw you were reviewing quadratic equations, so I gave you a few problems. The problems you did before were too easy; the person who made them clearly wasn't very good. If you do the ones I gave you, your grades will definitely improve quickly!"

Shen Jingyan looked at the thirty-odd questions that had suddenly appeared out of nowhere and said, "Listen to me, thank you."

"Grandpa, are you a math teacher?"

Old Xu frowned and tried hard to remember, "I think I taught it... but I can't remember."

After saying that, he grabbed two more buns and started eating them with both hands.

Old Xu had an astonishing appetite; he ate ten large steamed buns and drank four bowls of sauerkraut soup in one meal.

After a hearty meal and drinks, Old Xu slumped onto the kang (a heated brick bed) and fell asleep.

Shen Jingyan smiled helplessly and covered Old Man Xu with a blanket.

In the afternoon, having nothing much to do, she solved all thirty-odd problems that Old Man Xu had left behind.

It must be said that although this old man looks confused, his ability to create questions is anything but. Each question has different characteristics and requires different problem-solving approaches. The more than thirty questions cover almost all the knowledge points of quadratic equations in one variable.

Old Xu slept until dusk, and when he woke up he complained that he was hungry.