Cousin Brothers

Earth. 

The sixth year and fourth month of Shenyuan.

"What? A year has passed since we entered the Dragon World?!" Fang Ning said in shock.

"Stop exaggerating. It's only been 8 months. Think about it. You've been training in isolation twice. One was in the glacial wind while the other was in the desert. Then, you'll need to count our travel time as well. Be grateful it's not a few hundred years that passed. You're already lucky that you haven't lost anyone at all," Sir System scorned.

"Uh, that's true." Fang Ning quickly accepted reality.

After all, there were many mythical legends, such as the legend of the Lanke Man and the story of the Cave-dwellers, wherein a person could be watching a round of board game while a few thousand years passed by, or a group of people could spend a night in a cave and wake up in a completely different era.