An abrupt earthquake caused many buildings in Pengcheng to crack. Surprisingly, this wasn't due to poor construction quality. On the contrary, this was a result of repeated natural disasters over the years - whether they were extreme cold or hot temperatures, followed by prolonged periods of flooding.
There is an old saying that buildings can withstand a thousand years of dryness, a million years of dampness, but just half a year of intermittent dryness and wetness. Buildings in Pengcheng were showing signs of exterior peeling. Before the natural disaster, city officials would have arranged for immediate repair to maintain city appearance. But in these desperate times, no one had the leisure to care about the aesthetics of building exteriors, a habitable environment was all that mattered.
The sudden earthquake reminded everyone of scenes from the previous natural catastrophes, causing everyone to swiftly evacuate from various buildings.