Introduction to Advanced Mathematics

Lu Nan and Ling Chuan's father sat face to face in the coffee shop, with several printed documents on the table.

"This is an agreement for you to give up the property rights of the house. After signing it, all the debts under the name of your aunt are no longer related to you."

He pushed another check: "This is your alimony paid in one lump sum, and it's also written in the agreement. You can't ask Xiaochuan for any reason in the future."

He took out a pen from his coat pocket and put it on the table, opened the ink pad beside him, and calmly waited for the reaction from the other side.

The man surnamed Qian took a look at the check, and said angrily, "That's all, send the beggar?"

Lu Nan's eyes were indifferent: "In my eyes, beggars still have something to be pitied, but it's obviously a waste to use that kind of emotion on you. Your pension is only so much, should you insist on property rights and choose debt, or take a check and be obedient Leave and decide for yourself."

Under Lu Nan's aggressive aura, the man actually felt unreasonable fear. This was the first time he felt a frontal threat from Lu Nan, and it was also the first time he realized that the other party was no longer the one standing in front of Qian Chuan. The child who shouted "Uncle, don't hit Xiao Chuan", today's Lu Nan has grown into a man who can take charge of his own affairs, but he himself in Sunset West Mountain is no longer able to compete with him.

He glanced at the agreement unwillingly again, grabbed a pen, signed his name uglyly at the end of each document, and then pressed his fingerprints one by one.

"Okay!" he asked ferociously.

Lu Nan checked it out, put it in the folder with satisfaction, covered the inkpad calmly, and took back the pen without shaking his hands.

"You can take your check and go."

The man disliked his way of firmly manipulating others, and said viciously: "You are as scared as a dog in front of Xiao Chuan, who are you acting so like?"

Lu Nan raised his eyelids in disdain, but at this moment, the expression on his face changed drastically, his pupils constricted as if he had seen a ghost.

The man was so frightened by him that he subconsciously turned his head to look back. He didn't see a ghost, but he saw his son.

Lu Nan stood up nervously: "Xiao Chuan."

"What are you doing here?" Ling Chuan looked at Lu Nan expressionlessly, and then at the man surnamed Qian.

"It's okay, let's go." Lu Nan wanted to take him away first, but Ling Chuan saw the check that hadn't been taken yet.

"What is this?" Ling Chuan fished it out, but the man wanted to take it but was a step too late.

"That's mine!" He wanted to snatch the check from Ling Chuan in dissatisfaction, but the other hand withdrew it.

"You gave him money?" Ling Chuan looked at Lu Nan with sparkling eyes, his emotions were still not fluctuating, but Lu Nan was furious.

"It's just a one-time payment of his pension, otherwise he will still have a reason to ask you for it when he gets old!"

Compared with him, Ling Chuan's attitude is much calmer: "Who wants you to give him money, what is there to do with such a person, he never raised me when I was young, why should I take care of him when I am old? "

"It is a legal obligation to support your parents. If you don't comply, there will be hidden dangers. How do you know whether he will sue you in court in the future!"

"Then let him sue," Ling Chuan said indifferently, "I haven't sued him for not supporting his wife and children yet."

"Have you guys finished the quarrel? Give me back my money after the quarrel!" The person who had been ignored interrupted impatiently.

"Your money?" Ling Chuan smiled contemptuously, raised his hand and tore the check in half, "Where is it?"

"you!"

"Xiao Chuan!"

The two roared in unison.

"I see, the two of you colluded to deceive me," the man pointed at the two excitedly, "One forced me to sign the agreement, and the other came out to play tricks after I signed it. Give me the money, right?"

He kept pointing with his fingers, while stepping back towards the door: "Okay, okay, okay, you wait for me."

The door of the coffee shop opened and closed, Lu Nan's face was so dark that it couldn't be darker.

"What are you doing? I already dealt with him!"

"I don't agree with your solution. I'd rather see him lose his gambling and get his hands chopped off. In his later years, he would kneel on the side of the road begging like a dog, or simply get drunk and fall into the gutter and never get up again. Are you Don't you think I'm cold-blooded? That's right, I'm like this now, are you starting to sympathize with him?"

"I don't sympathize with him! I care about you!" Lu Nan said excitedly, "I want you to have no more contact with him for the rest of your life, and to get rid of his harassment forever! Don't worry about it, don't need to sleep at night..."

"When did I worry about it, and when did I lose sleep at night?" Ling Chuan interrupted him with a disappointed expression, "How incompetent do you imagine me to be. Also, I'm talking to you calmly, why do you have to do that?" Excited? Lu Nan, your temper was not like this before."

Lu Nan closed his eyes and forced himself to take three deep breaths, but it still didn't get much better: "I just want to help you create a harmless environment, why don't you understand?"

"Since you can't calm down, I don't want to continue arguing with you. Let's talk at another time."

Ling Chuan lifted his feet and left. As soon as he walked out of the coffee shop, he felt a gust of cool wind behind his ears, followed by a blow on the back of his head.

"Xiao Chuan!" Lu Nan who followed behind shouted in horror.

Ling Chuan turned around, his biological father was holding a wooden stick, and stared at him through gritted teeth. Seeing that one stick didn't work, he wanted another stick, but was punched aside by Lu Nan who rushed to him angrily.

Lu Nan attacked like crazy. He obviously learned Sanda, but he didn't know how to fight. Fear and anger swallowed his reason. Fortunately, the young man's physical strength and strength prevailed. The man was his opponent, he was beaten so hard that he couldn't fight back in an instant.

Ling Chuan stretched out his hand to touch the back of his head, and withdrew it expressionlessly, his fingertips were already stained with blood.He took out his mobile phone to call the police, but the other pair had already ended the fight quickly. The person who was violently attacked fell to the ground motionless. The pale Lu Nan gave up his hands, staggered back two steps, and sat down on the ground .

As if greatly stimulated, Lu Nan hugged his head and curled up into a shrimp.

"Lu Nan, what's the matter with you, Lu Nan?" Ling Chuan ran to his side, but saw beads of sweat rolling down his forehead continuously, his eyes stared into the distance absently, his pupils shrunk to the size of pinholes.

"Lu Nan, Lu Nan." Ling Chuan kept pushing him to wake him up.

Lu Nan's lips trembled and uttered a few syllables, the voice was too low for Ling Chuan to hear clearly, so he had to put his ears closer: "What did you say?"

This time he heard, there were only two sentences repeated in Lu Nan's mouth:

"Don't hit Xiaochuan.

"Uncle, don't hit Xiao Chuan."

"I'm fine, no one hit me, don't be afraid."

The siren of a police car was heard in the distance, Ling Chuan took Lu Nan's arm, trying to help him up: "Let's go to the hospital."

Lu Nan, who had only a trace of sobriety left, grabbed his arm: "It's called... Ying... Li..."

It was only then that Ling Chuan remembered that Ying Li was a medical student. He immediately took out Lu Nan's cell phone, and was surprised to find that Ying Li was the first in his address book.

After receiving the news, Yingli rushed to the scene, took out the spray from the first aid kit and sprayed it twice on his mouth and nose, and then quickly put on the airtight cover.

"Listen to me, breathe—take a deep breath—"

Lu Nan followed his gestures and slowly adjusted his breathing. After a while, Ying Li put his fist in front of his eyes again: "Look here, can you hear me? Look at my hand."

Only then did Lu Nan's slack eyes refocus a little bit. Ying Li was very skillful in doing all this, and Ling Chuan was watching all this from the sidelines, unable to intervene or help.

"He's not in danger for the time being, but he can't be stimulated anymore." Yingli hurriedly put away the stethoscope, took out the injection and shook it well in his hand, "I'll handle it at the police station."

He raised his eyes and saw Ling Chuan half way through the shake: "You need to go to the hospital for treatment of your injury first."

Ling Chuan realized the pain only after he reminded him: "What about Lu Nan?"

"With you, I'll give him a sedative first just in case."

Ying Li quickly finished these tasks and sent the three injured patients to the ambulance, while she got into the police car with the cases she had already prepared, and rushed away.

Ling Chuan was bandaged in the hospital and recorded a statement. Lu Nan did not wake up due to the sedative until Ying Li rushed over, and the two of them took him back home with difficulty in a wheelchair.

"Can he just leave like this? I thought the police would not let people go so easily."

"Your father is not so easy to be released, but Lu Nan has a case and can apply for isolation and treatment. But this matter is not so simple to deal with. Be careful not to spread it, otherwise it will affect his work. Not everyone wants to have a mentally ill person sue for them."

"Case? Lu Nan has a history of mental illness, why didn't I know?"

Ying Li brought his business card this time, and it was the first time Ling Chuan knew that he was a psychiatrist.

"His symptoms will only occur under specific circumstances, and his daily work and life will not be affected. Therefore, no third person knows about it except me and him."

Ying Li had been paying attention to Ling Chuan's expression when he was speaking, but he seemed to have little reaction to every word he said.

"Then what symptoms does he have, can you tell me?"

Yingli hesitated for a moment: "Originally this is the patient's privacy, but I can tell you because of your relationship. His symptoms are mainly depression and insomnia. He often sheds tears for no reason at night, frightened and unable to sleep at night. Occasionally there will be anxiety and irritability, but it is the first time I have seen it to this level."

"You know about our relationship?"

"I have been his psychological counselor for nearly three years, and he told me everything about you, including your dating and breaking up, but not including the matter of getting back together."

Ling Chuan was surprised that Lu Nan had lied to him so much: "But he never mentioned it to me, no wonder he has changed so much."

"He hasn't come to see me since a month ago, you should have been together at that time."

Ling Chuan nodded.

"It was previously speculated that your emotional reunion might help his illness, but now it seems that may not be the case. At least in the past few years, he has never shown any violent tendencies."

"Are you implying that I made him worse?"

"I didn't say that." Yingli denied.

"Since he told you everything, you should also know that we have been dating in secret since high school, until we were accidentally smashed by the man who gave birth to me three years ago and made a big publicity, not only made my mother sick and hospitalized, but also hurt He was forced to change his firm. For three years, I deliberately avoided all dealings with him, just not wanting him to be implicated by me and my family, so I don’t know anything about what you said. "

"During the time we were together again, I found that he was a little abnormal, but I have never seen the situation like the unreasonable tears you said. As for the insomnia, I am sorry that I sleep very well every day, even if He really has any symptoms, and I can't find it."

Ying Li silently opened the bedside drawer, took out a few small medicine bottles and threw them to Ling Chuan.

"I prescribed all of these for him, sleep aids. Have you never seen him take them?"

Ling Chuan stared at the smeared labels and was a little dazed: "He told me that they were all vitamins...huh?"

He glanced out of the corner of his eye, and a tear fell from the corner of the eye of the person sleeping peacefully on the bed, rolling down the ear to the back of the neck, leaving a long tear trail.

"He's awake?"

Yingli checked his pupils: "No, it might just be a dream."

"Are you going to wait here until he wakes up?"

"I want to make sure he's okay."

"Then let's go out and wait so that we won't disturb him."