Chapter 90: Chapter 70: A Mysterious Peak Emerges

The drone spotted the Red Dragon and turned around, beginning to chase after the Red Dragon.

However, Yan Fei no longer dared to have the drone ascend to the sky in pursuit, as doing so was far too dangerous. He also wasn't sure if flying close to the sea would be detected by that huge airplane capable of firing laser weapons, so staying at the bottom of the sea was the safest.

The underwater cruising speed of the Red Dragon Submarine was only 20 knots, that is, around 36 kilometers per hour, but the underwater speed of Yan Fei's Drone Avatar reached 150 kilometers per hour, far surpassing that of the Red Dragon. Therefore, ten minutes later, the drone had already caught up to the Red Dragon, and by then, they were only 65 kilometers from the Shanghai city area.