The advent of fresh water made Chu Wu give up the plan of introducing seawater, but he still dug four canals one and a half meters deep and one meter wide, which were intersected in a 'meter' shape, and the outer ends of the canals were only separated from the sea by one meter.

In this way, the mermaid girls only need to sit on the shore at the outer end of the canal, turn their butts to enter the freshwater canal, and then swim anywhere on the island.

These four canals are a big project

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