C508 Regret Rescheduled

"What?" Ouyang Qing knew that Luo Huian called because there was something he needed to decide, but he didn't expect it to be this serious.

"At the time of the survey, this geographical problem was not apparent. Now that we are ready to start, we find that the underground water has eroded the base layer, so we need to immediately fill it up." Luo Huian said