This sounds like mythology, although not that of Wei or Jing. Heroes who die in battle attaining rewards in the afterlife must be the most common myth for any kingdom to tell, for obvious reasons. But what kind of reward is this?

Talking so much has tired Qi Yan a little, and put some strain on her fragile lungs. She starts to speak, and then stops to cough discreetly into her sleeve before continuing. "If you die heroically in battle, shouldn't you be allowed to rest? Not told to fight and die again?"