Chương 6831: A strange suction force (3)

It was hard to say how the suction in the trench was formed and why there was such a strong suction. But looking at the cultivators, there should be no problem now.

Zhao Hai let out a long breath and slowly dived down. At the same time, he released some Mercury needles. These needles covered the entire trench and recorded the terrain, the monsters, and the plants in the trench for him to collect first-hand information. It would be more convenient for him to observe the trench in the future. Zhao Hai had even thought about it. If he really conquered the 72 islands in the South China Sea in the future, he would make better use of the seawater in the trench.

As he collected information, he dived into the trench. At the same time, Zhao Hai did not take back the mercury needles that were first sucked into the trench. Instead, he let the mercury needles continue to dive. He really wanted to know what was at the bottom of the trench and why there was such a strong suction force.