The End of the World: Start by Stocking up on a Train of Supplies

He was a small employee in the maintenance department of the Railway Bureau. He died in the apocalypse and was reborn. After rebirth, there are three days left before the end of the world breaks out. In order not to repeat the mistakes of his previous life, he decided to become stronger! On the first day, he went to a corrupt official's house to withdraw tens of billions of dollars in cash and used it to purchase a large amount of supplies. He hoards all his supplies on an abandoned train. The next day, he began to strengthen the abandoned train, making sure to make the abandoned train impregnable. The third day......