**Story Introduction**
**In the winter of 1950, the steel oath on the banks of the Yalu River**
On the third day of his wedding, railway engineer Qi Tieshan received a bloody order in the ice and snow. When the flames of US bombers reflected the Yalu River Bridge red, he rushed to the Korean battlefield with his wife's "Locomotive Failure Manual" sewn into a cotton-padded jacket, becoming the sharpest spike on the "indestructible steel transportation line."
**From the raging fire of resisting U. S. Aggression and aiding Korea to the cliff of third-line construction**:
- **Technical Miracle**: Made a stethoscope from US military bomb shells, created the "ice blasting method" in the extreme cold of -38°C, and used rail vibration waves to transmit secret electricity
- **Bloody Romance**: a wedding ring made of shrapnel, a love letter embedded in a railroad track, a tunnel wedding refracted by a spirit level
- **Historical Marks**: 12 real battles, 7 national industrial patent prototypes, the inheritance ceremony of the 3rd generation locomotive
**1984, the eternal password of the Chengdu-Kunming Railway**
When Qi Tieshan stood in front of Pier 7 of the Longgudian Bridge, the concrete pier where 22 railway martyrs were poured, he heard the familiar 82Hz vibration coming from the rails. It was the night of the armistice in 1953. They used the railroad tracks to beat out the rhythm of "Singing the Motherland".
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**"The rails will rust, but the oath carved in 1953 is still passed on today——**
**Vibrates between the atoms of each rail at a frequency of 82 Hz. "**
