At the beginning, you get a passage that can freely travel between the present world and the end of the world.
What is most valuable in the last days? Gold? Black technology?
No! It's a bite to eat!
A can of Coke that costs two yuan in this world can be exchanged for a cool female bodyguard with a hot figure and explosive fighting power in the end of the world!
A pack of compressed biscuits worth ten yuan in this world can be exchanged for a high-precision laser rifle in the future!
A hundred yuan of antibiotics today can be exchanged for black technology blueprints that are a hundred years ahead of the earth!
