Chapter 498: Familiar Operation_2

Due to a violent explosion underground, part of the tunnel that the Drone had previously dug collapsed, or the passage was blocked by mud and rocks. However, these obstacles were nothing before the Drone's huge Drill Bit, so the Drone quickly reopened the upward passage.

Compared to the difficulty of drilling downwards earlier, the Drone now found it much easier to return along the same route, at least not consuming as many Energy Points as before. Two days later, the Drone returned to the Persian Gulf waters via the previous tunnel. It was only after it surfaced that it discovered the local time in the Persian Gulf was 2 a.m. After ensuring absolute safety, the Drone levitated and flew towards Dream Island to the east with Yan Fei aboard...

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