Lin Xian had already circled around to the back of the house, starting a thorough search.
"I found it!"
Underfoot, there was a hidden steel trapdoor.
Indeed.
Just as he imagined.
There really was a hidden underground space in this farm.
It took quite some effort.
Lin Xian exerted himself to pry open the heavy hidden door and looked down; a deep underground passage awaited:
"What on earth... is this place?"
He didn't hastily climb down.
It's pitch black, not very safe. Moreover, this passage seemed more like an emergency escape route, Lin Xian found it hard to believe that Einstein, at over seventy years old, could navigate such a vertical passage.
"There must be other entrances and exits."
With a target in mind, the search went much quicker.
Very soon.
He found several ventilation shafts, then found a hidden periscope, seeing these devices, he finally understood what was hidden beneath this farm—
"An underground air-raid shelter."
Suddenly, enlightenment struck him.
