The War God's Companion is a Scientist

Synopsis: 1. Shen Chenyue was a scientist who held the key to human survival. But malicious rivals retaliated against him, causing him and his research achievements to perish in a raging inferno. When he woke again, he had transmigrated into a book as a cannon fodder character with the same name. The key to human survival had become a system stored in his mind. In the book, the original owner was a lovesick fool with three physical disabilities who, for the sake of a scumbag, reduced himself to a low-class citizen. Low-class citizens could only receive 250 five-tier coins per month, were confined to the slums for life, and were forbidden from setting foot outside. Shen Chenyue was no...