I recommend Red Alert: Tycoon of Science and Technology, a sci-fi novel. At the beginning of the story, the protagonist transmigrated to the Red Alert base car in a parallel world and obtained all the technology of the unit. The protagonist used his own technology to successfully create the world's number one technology company. At the same time, he also became the world's richest technology tycoon. The book also involved the protagonist being interviewed by reporters and other plots. Although it did not completely match the plot described in the question, the book also talked about the protagonist defeating the enemy and collecting weapons. It could be used as a recommendation. I hope you like this recommendation. Muah ~