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As Niu Weiguo finished speaking, Nie Zhenbang's face, along with those of Liu Junwei and Xia Hong beside him, changed. The upstream had ultimately been unable to withstand the pressure and had begun to discharge floodwater. It would pass by after eleven o'clock at night. This was not a good time.
Everyone knew that people were most tired in the early hours of the morning, and, in addition, it was difficult to see in the dark. This added significant pressure to flood control, to put it simply. When the flood peak passed by, the pressure the Lushan Dike would have to bear would be unprecedented. It was a test of the entire dike's safety. One could imagine the continuous emergence of various dangerous situations at that time.
The simplest concern: piping. If it were daytime, with ample light, you could pay attention to any situation inside and outside the dike at any time.
