The evil twin, that is Little Jin, also doesn't know the whereabouts. Little Jin said he was separated from Mr. Jin for a long time.
After Little Jin split into two, Mr. Jin soon learned of the Bunker's existence.
The long separation was the time Mr. Jin spent establishing the Bunker.
Based on what Wei Ping'an said, soon after that, Mr. Jin gained powerful strength and annihilated the people from Longxia Country who came to arrest him.
It wasn't the evolution system of end times monsters; Mr. Jin acquired some kind of additional strength.
Because of this, after entering the Bunker, he climbed with this power. At that time, in the eyes of the old principal, Albert, he was akin to a god.
But Mr. Jin's miracles ended quickly. After bringing back Little Jin, he stopped climbing the towers.
He hadn't climbed a tower for decades, and along with Albert's incredible talent, Albert became the strongest in the Bunker.
