The solutions of the functions are the points where they intersect.

December 21st was the day when Lao Lin had a car accident.

In the morning, Lin Chaoxi bought breakfast and stood at the entrance of the reception area on time. In the plastic bag were freshly made rice balls, which were still steaming when they were taken out because they had been kept in clothes.

Lao Lin walked slowly from the end of the alley, as if it was just an ordinary day and he was just being casual. The weather was still very cold, but it had been sunny for several days and most of the snow had melted away, leaving only the blue sky and the busy streets under the blue sky.

Old Lin's eyes were bright, as if he had a good dream last night. Lin Chaoxi stuffed the rice ball into his shirt pocket, and when she took it back, she had a roasted sweet potato in her hand.

The skin was slightly burnt, and when it was torn open, the inside was soft. Lao Lin whispered to her that the sweet potato was extremely sweet, and walked with her to the bus stop.

She left the Tzu-En Nursing Home about an hour ago.

The ward was filled with draft papers and books. When she left, the lady on the bed fell into a deep sleep again. Pei Zhizheng took a book away from his mother's hand.

As I recall, it was a book called "Database Modeling Technology". Pei Zhi's mother barely flipped through one page, but Pei Zhi had read the entire book.

The ventilator was still working as hard as it could. In the morning light, Pei Zhi waved goodbye to her.

She did not tell Pei Zhi why she did all this. For Pei Zhi, he was just helping her perfect some of her hobbies while accompanying her mother in the last few days of her life.

The specific content of the work is not important; what is important is that it all happened in that ward.

For the first time in many years, Pei Zhixu showed his outstanding mathematical talent in front of his mother. In a very short time, he reassembled the vast amount of data in an ingenious way.

After that, the whole process went much more smoothly.

Pei Zhi agreed to help her monitor the program, and they agreed on some new strategies, such as fixing the starting time and using mobile phones to locate real-time locations to greatly simplify the difficulty of prediction.

They discussed all this in the ward, and Pei Zhi's mother even found a computer for them.

Lin Chaoxi actually doesn't believe that a note can change deep-rooted beliefs, but perhaps it can make a mother who loves her child just as painfully start to try to understand. Although it is difficult, and she has little time left.

And Lin Chaoxi thought that, in fact, the time she stayed here was coming to an end.

——

The road is busy, the bus is coming, the door opens, and people get on.

People were crowded and quiet, the scenery passed by outside the window, it was a street that was familiar yet unfamiliar to her.

The sound of the boy's steady breathing could be heard from the earphones on one side, and the originally uneasy journey seemed to become much calmer and more relaxed.

She and Lao Lin got off the bus.

In the distance was the road leading to the school. In just ten minutes, she had thought about it countless times.

There is an alley entrance 50 meters ahead, with some forked roads and a lot of electric vehicles.

There are two roads in the middle, which are often congested during rush hour. Next is the campus where Lao Lin will give a report.

There should be a banner welcoming the experts and college students who are full of energy.

She and Lao Lin walked towards there at a steady pace.

Pei Zhi kept telling her the results of the route prediction in a very calm tone. Lin Zhaoxi listened to his voice and the space behind it.

She kept walking, and everything in front of her seemed to be so dim that it was about to melt away under the bright sunlight.

The world seemed to be dissolving at this moment, but the calm faces of Feng and Lao Lin were unusually clear.

500 meters...

400 meters...

300 meters...

Pei Zhi's serious reminder and the sharp alarm of the life monitor in the background sounded at the same time. Countless people rushed into the ward, and the sound of footsteps came one after another. Lin Zhaoxi bit her fingers and tried not to cry out loud.

Lao Lin seemed to sense something and looked at her gently: "Go back to the hospital."

Lin Chaoxi shook his head at him and pressed the earphone tightly with trembling fingers.

"Pei Zhi."

"kindness."

"I will come back after attending Comrade Lao Lin's report."

"good."

"Wait for me."

"I will."

"goodbye."

"goodbye."

The Pei Zhi of the past should be handed over to the Lin Chaoxi of the past.

"I'll go there with you." Lin Chaoxi looked at Lao Lin and said this.

Lao Lin looked at him in some confusion, but seemed to sense something. He stretched out his hand with great difficulty and held her.

They stood together at the traffic light.

In front of her was the gate of Yongchuan University. She saw 25-year-old Lao Lin pulling out his arm and rushing out of the school gate without looking back.

The red light turned green, and Lin Chaoxi grabbed Lao Lin.

A van drove past them.

At the crossroads, the sky was clear and the air was fresh, and everything seemed to have dissipated like smoke.

This is 41-year-old Lao Lin and 16-year-old her.

It was the high-spirited old Lin, and the toddler girl.

It was Lao Lin who rushed into the clinic, and she who was just born.

Thank you for choosing to be my dad.