Full notes
Full 长明火计划 Project: Eternal Flame update
Read the full published notes in a cleaner layout. The original post stays linked below.
解决方案： 更新游戏之后，在阅读过全部9首诗的存档内再次阅读任意一首诗就能获得成就了。
Source
Changelog.gg summarizes and formats this update. How we read updates.