Chapter 1008: 405

Although this place was an underground hot spring with a temperature reaching 90 degrees Celsius, everything is still pitch dark except for the light emitted by Yan Fei's diving suit. Moreover, the waterways were incredibly narrow and tortuous, with many spots just wide enough for Yan Fei wearing the diving suit to pass through.

Fortunately, Yan Fei had already obtained the three-dimensional terrain map of the underground hot spring through the Quantum Radar, so as he swam through the waterways, he could accurately avoid the sharp rocks and prevent them from tearing his diving suit and putting him in danger.

In such a cautious environment, Yan Fei's swimming speed slowed down. However, the horizontal tunnel was not long, and he quickly passed through it, coming up to the Main Waterway of the hot spring. After determining his direction, Yan Fei began to swim upward along the hot spring.