This story tells the story of Chen Mo, a high school physics teacher in the 21st century, who accidentally traveled to Chang'an City in the 17th year of Kaiyuan of the Tang Dynasty:
- When he first arrived in the Tang Dynasty, Chen Mo was in trouble because of his weird clothes and penniless clothes. He barely made a living by doing odd jobs in a grocery store.
- By chance, he used the principle of center of gravity in physics to explain why oil lamps fell easily. After that, he began to use physics knowledge to solve practical problems around him, such as improving bellows, using buoyancy to sort cloth, and adding fixed pulleys to facilitate water lifting. He gradually gained a reputation as an "ingenious person" in Xishi.
- He was invited to improve the chronometer (ancient timepiece) for the Ministry of Works. He solved the problem of fast and slow water flow by designing a supply pot to stabilize the water level, and was recognized.
- Chen Mo refused to become an official in the court, but asked for the establishment of a "Gewu Yuan" to teach children "ingenuity" based on physical principles, such as the reflection of light, the principle of leverage, etc.
-In the end, he found a new value in teaching and educating people in the Tang Dynasty, and used physics knowledge to spread the power of knowledge in the prosperous Tang Dynasty.
