Before a complete underground drainage system was established, it was very unusual for underground civil air defense facilities to be free of waterlogging.
Especially in a place like Tianmen City, where nine rivers flow to the sea, don't even mention underground air-raid shelters; if you dig a well three meters deep on the ground, by the next day, it could be filled with water.
Initially, Wang Yunxiao couldn't understand why there was such a well-preserved underground civil air defense facility beneath Qinghe Middle School, and even more perplexing was that there wasn't a single trace of water.
It wasn't until he attended cram school that he learned the reason.
On the fifteenth of each month, the "Real World" would devour the "Outer Dimension".
This underground civil air defense facility wasn't a real entity of the real world.
It had been snatched away.
Not to say that this explanation was definitely correct, but it could explain things with this principle.
