Chen was an ordinary college graduate. One day, he was suddenly summoned by a mysterious national destiny and transmigrated into the world of Honkai: Star Rail. After arriving at Herta Space Station, he discovered that he had unexpectedly gained the memories and powers of the Hyperion’s captain from Honkai Impact 3rd in a parallel universe, along with a powerful weapon, the Infinite Iron Core, which contained thirteen sealed Divine Keys.
National destiny had emerged because the world was facing one crisis after another. War, nuclear wastewater polluting the oceans, prohibited biological experiments, and the overexploitation of natural resources had all thrown nature out of balance. With the arrival of national destiny, one Trailblazer from each country would be chosen to undergo trials, earning resources for their nation while restoring the ecological balance.
As the Trailblazer for the Dragon Nation, Chen discovers within the national destiny trial grounds a version of himself from another world, and the connection between them. Faced with one crisis after another, what will become of his fate?
This seems to be a good beginning, don't stop updating it, it's very novel, and it should become popular if you write it for a long time.