Old Ancestor: Thrown Out By The Nanny From The Start - Chapter 223
“With our current technology, submarines will reach their limit at 10,000m.
I can’t begin to imagine the water pressure beyond that.
The people of the Himmelian Pavilion can dive 20,000m into the ocean, and that’s already incredible.
With some equipment, they can reach 30,000m.
Do you understand how amazing that is now?”