Vroom—
Rumble, rumble, rumble!
The train raced through the darkness.
The deep Underground World was threaded with countless tracks, all built by the Star Radiance Empire long ago.
Gu Qingshan knew the functions and structure of the entire Star Radiance Empire steel train.
Through the Star Chart, Su Xue'er knew the way forward.
Working together, the two drove the train through the darkness, switching tracks again and again as they headed toward the destination marked on the Star Chart.
A whole night passed like that. The train kept running without a pause, but the two of them were growing tired.
—Now that they were all ordinary people, they had walked for most of the day, fought monsters, and then spent the entire night operating the train. They were exhausted.
"Qingshan, let me drive. You get some rest," Su Xue'er said.
Gu Qingshan smiled helplessly and said:
"Wait a little longer. Around six, the train will change forms."
Remembering the directions on the Star Chart, Su Xue'er said, "That's right. The tracks end up ahead, and there's nothing but darkness beyond them. How are you planning to get across?"
"It'll turn into a ship—Lan Xiu and Gu Yan can both pilot a spacecraft. I'll leave the rest to them."
As he spoke, Gu Qingshan began working the controls at lightning speed.
The train gradually slowed down.
Just as the tracks disappeared completely, the train shot into the air and slowly transformed into a steel spacecraft.
"I've had enough rest," Lan Xiu's figure appeared in the cockpit. "We'll take over from here."
Gu Yan came in as well and said, "You two should get some rest. We don't know what lies ahead, so you need to keep your strength up."
Gu Qingshan and Su Xue'er left the cockpit and returned to the