A Perfect Yesterday in Genshin Impact is an achievement you can earn for being interested in the history of the Fontaine Kinetic Energy Institute. Simply put, you need to read a specific book in the Archive. In this guide we will show you exactly how to do this.
How to get to the Archive
To gain free access to the room, you will have to solve puzzles with energy transfer terminals during the quest "The Fontaine Research Institute, Stagnating in the Rubble" – we advise you to refer to our walkthrough if you have any difficulties with it; The puzzle is described almost at the very beginning.
Where to find the book
Once in the Archive, go to the far table - there is also a small lamp and a gramophone on it. In the book you can see the layout of the Institute and the purpose of the various rooms.
When you close the book, you will immediately receive the achievement. There are several other fun works related to the Institute in this room, but, unfortunately, you will not receive rewards for reading them.
Awards
The achievement belongs to the section “Wonders of the World”. Once you receive it, you will also get 5 Primogems.
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