The temperature difference is fluid, and love is also flowing quietly, half a degree hinting at a subtle gap that just makes people's hearts beat.
She traveled between the two cities, and he traveled between his and her hearts.
Shen Wanyin's job involves traveling back and forth.
For three years, she has been running back and forth between Lin'an and Xunyang every week. Lin'an has her younger brother who is in college, and Xunyang has endless work. She has long been accustomed to this temperature difference.
Until her brother's roommate appeared in her passenger seat.
Cheng Zhaoyuan, 22 years old, an only child, sweet-tongued and thick-skinned, has been calling her "sister" since the first time they met. He takes advantage of her food, car, and time, like a large dog that can't be driven away.
Shen Wanyin told herself that this was just her brother's roommate, a child who had not grown up.
But the children would rush to help her without saying a word when she took her dog to see a doctor, and would hand her his big umbrella on a rainy day when she failed in the exam.
She thought he was just a sweet-tongued boy. Until she walked into his other world, the workshop of Formula Student racing. I kept my phone full of oil, stayed up all night, and made a fuss over a few millimeters of suspension parameters until I was red in the face. The moment she saw him sitting in the racing car with his goggles pulled down, his whole body shone.
A week before the race, the racing chain broke. His voice was hoarse on the phone: "Sister, it may be too late." She bought a late-night snack and sent it to the laboratory. She didn't say anything and sat with him until three in the morning.
The moment he crossed the line in the endurance race, he climbed out of the car, found her in the crowd, and hugged her. She smelled the oil on him and heard his heart beating faster than the engine.
Two cities, four years of temperature difference.