This is perhaps connected to the traditional belief that those who perform meritoriously for the state can be worshipped; their status would be enhanced all the more if they were posthumously "ennobled" by the emperor to become official deities.
這或許是受了中國傳統信仰中，有功於社稷百姓的「聖哲英靈」可以受祭享的影響。尤其一旦受人間皇帝追封而成為「正式」神明的，更是身價大漲。