An Apocalypse Army Medic Transmigrates to Ancient Times and Gets an Overpowered Upgrade

Military doctor Shen Qingtang, who lived in a post-apocalyptic world, was surrounded by zombies during a mission because of a miscalculation. After detonating a grenade, she accidentally transmigrated to ancient times. She woke up inside a crude bridal sedan, with faint music and the quiet sobbing of a girl in her ears... Powerful nobles, infighting, war, conspiracies...

I'm so tired. Class is finally over, but I thought this was supposed to be the end... Waaah... I have to face all kinds of challenges and dangers again... Please let me lie flat.