Timeline

"How could he possibly be my grandfather?!"

"How could he possibly be my grandson?!"

Both were utterly shocked.

"Please, don't panic, gentlemen."

Liu Di raised a hand, signaling them to sit. "This may simply be a supernatural event involving time travel."

Qin Guang forced himself to remain patient.

He slowly sat on the sofa beside Qin Changhe.

He was a rigorously trained, self-disciplined soldier. Even now, he sat with his back perfectly straight in a standard military posture.

But the way he looked at Liu Di was filled with disbelief.

Liu Di smiled. "There have been quite a few incidents of time travel throughout history—the time traveler on the streets of Manhattan in 1876, Pan Am Flight 914, the builders of the Northern Egypt pyramids, and even Wang Mang, our ancient time traveler. They all belong to this category."

Qin Guang could not help saying, "Commander, but those are all just news stories."

Liu Di shook his head. "Even if they are merely news stories, the reason so many people know about them is because there are elements of truth within them."

"Besides, the principle behind crossing a timeline isn't all that miraculous."

Liu Di looked up at Qin Guang. "As one of China's top aviation engineers, you should know about the atomic clock experiment, right?"

"I do."

Qin Guang looked as though he had just realized something. "Atomic clocks are extremely precise timekeeping instruments. Two atomic clocks set to the same time—one is placed on the ground, while the other is placed aboard the fastest aircraft currently available."

"The North American X-15 supersonic aircraft travels at 7,223 kilometers per hour. It can reach Mach 20, or one-fortieth the speed of light."

"After the X-15 flew continuously for a period of time and landed, the atomic clock aboard it was