The super wormhole can open the space-time tunnel at any time, allowing people to travel back and forth between parallel universes. Bring a dressing mirror back to the Song Dynasty eight hundred years ago, and you can exchange for a luxurious mansion and a few charming maids. Transport two hundred bags
Rice can be exchanged for an Apache helicopter gunship in the zombie-infested apocalypse. The gene sample on the tail of a gecko can be exchanged for a robot production line from a high-tech world. A wonderful life comes from countless time travels...