Zhao Erhu was desperately searching for someone, while Lin Yue was staring blankly at the place where the river had disappeared. Originally, the river flowed towards their village, but it vanished before a small hill. Lin Yue observed the surrounding geography and concluded that the river must have gone underground, becoming a Secret River, which was why it couldn't be seen on the surface. She had heard of such phenomena before, but she did not know where the outlet of the Secret River might be. If it couldn't be found, they would have to divert water to that location, which would require a lot of manpower and material resources, and cause a great disturbance. It would be much better if they could find a place closer to her home.