Time travel? Dimensional leap? ...He didn’t have enough expertise to explain this extraordinary phenomenon. It was only after an accidental electric shock—which left him completely unharmed—that he discovered, after absorbing about 100 units of electricity, the empty slot on his wrist, like a tattoo, would fill up, thus meeting the conditions required for “crossing over.” Each crossing consumed about half of the energy slot, meaning that a full 100 units of electricity was enough for a round trip. The cost of crossing was only about 50 yuan—he had to admit, it was incredibly cheap.

Moreover, the function of this strange tattoo wasn’t limited to just crossing over. Jason Carter accidentally discovered that this thing not only allowed him to travel to a strange world, but also possessed an independent subspace! Simply put, it was a storage space of about one cubic meter. However, since storing or retrieving items from the space consumed a certain amount of energy, Jason Carter still chose to carry items in a backpack when crossing over. After all, if he didn’t conserve the energy in the slot and couldn’t find a way to replenish it in the apocalypse, wouldn’t he be stuck there?

Jason Carter had a hunch that this energy slot could probably be upgraded, and that the storage space also had room for expansion. He just hadn’t figured out how to upgrade it yet.

As for how to recharge? The method was simple—just stick the fingers of his right hand into a socket... Crude as it was, it worked. As for how Jason Carter discovered this method, as mentioned before, it was entirely due to an accidental electric shock.

The first crossing took place in an abandoned house. From the dust-covered bed and the decaying wooden windowsill, it was clear that no one had visited this place for a long time. After carefully confirming his surroundings, Jason Carter began to explore the dilapidated house. From a half-broken radio with storage function and some old newspapers, Jason Carter managed to piece together some information about this world.

This was a parallel world similar to Earth, but its technology was clearly ahead of Jason Carter’s own world. Skyscrapers stood everywhere, but there was not a trace of civilization. The streets were filled with zombies and mutant creatures, and with no reliable weapons, Jason Carter naturally didn’t dare to venture outside.

The year was 2190, and the location was still Shanghai, in the Republic of China. However, this Shanghai was almost unrecognizable compared to the one Jason Carter knew.

In 2150, global warming and the overexploitation of resources led to extreme shortages, and an economic crisis arrived as expected.

In 2164, a political crisis in Poland ignited the powder keg of Central Europe, and the Red Regime began advancing westward. As a result, global geopolitics entered a state of extreme tension. Notably, in this parallel world, the Soviet Union did not collapse in 1991. Thus, the world’s political landscape was divided into three poles: the NATO military bloc led by the United States and its allies, the Central Eurasian Red Regime (CCCP) led by the Soviets, the Pan-Asian Cooperation Organization (PCA) formed by China and South Asian countries, and a few marginal countries that remained neutral.

In 2171, the situation in Central Europe escalated, and the Red Regime declared war on the Blue Regime, with both sides accusing the other of firing the first shot—thus opening the curtain on World War III.

That same winter, the South China Sea Incident broke out. China and Japan fought a naval battle in the South China Sea, NATO declared war on the Pan-Asian Cooperation, and the Asian theater of war began. That year, a political crisis erupted in Mongolia, leading to military friction between the Red Regime and China, forcing both countries to amass large military forces at the border.

In 2172, the Red Regime detonated the first nuclear bomb in Paris, marking the beginning of the nuclear phase of World War III.

In 2173, this modern war unexpectedly reached a stalemate. The entire world suffered from nuclear radiation, and the ecological environment was almost irreparably destroyed. Nuclear winter covered 80% of the Earth’s land in ice and snow. No one expected that global warming would end in such an ironically tragic way. War, famine, disease... In just two years, this modern world war nearly exhausted all the vitality of human civilization, causing economic losses far greater than the combined total of World War I and II. Because of this, peace naturally arrived without a clear victor—everyone knew that if the fighting continued, no one would survive.

On New Year’s Day 2174, the peace treaty officially took effect. The “Rebuild the Biosphere” project was launched, with all countries jointly funding the radiation cleanup plan.

In the autumn of 2174, the International United Organization announced the failure of the “Rebuild the Biosphere” project. The radiation-purifying fungi under development mutated uncontrollably due to radiation, and, following attacks by unknown armed forces, the mutated bacteria spread rapidly throughout the cities. Humans infected by the mutated bacteria turned into zombies, and a global biochemical crisis erupted. All institutions collapsed, and all order disintegrated overnight.

...

In 2176, the World United Organization launched six colony ships toward Kapteyn B in the constellation Centaurus. Carrying the hopes of human civilization, these “seed ships” sailed into space in search of a new home. Yet all of this had nothing to do with those still struggling on the ground.

That same year, the World United Organization announced its dissolution.