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Even Lu Que and Gu Qingcheng, who had entered the area once before, did not have much understanding of the Qui Zai Lake. The reason why Gu Huairen had said that was because he believed Zhai Ning would be able to use the underwater stone bridge to return to the southern shore, so they definitely would be able to do the same.

Moreover, if they could measure the strength of that stone bridge