In Genshin Impact, the Rusty Key in Chenyu Valley is an important item needed to open the lattice door behind which you can find spiritual carp. In this guide, you will learn where you can find this key and which grate it will unlock.
Rusty Key in Chenyu Valley
Where to find
Teleport to the statue seven Archons on the Chizhang Wall, and then go south to the ruins of the building. Here you will find steps leading to nowhere, and among the cobblestones a white light will glow – interact with it to find a rusty key.
Important: If the desired area is filled with water, then you first need to solve the local puzzle related to obtaining the Chizhang Fragrant Wood.
How to use
Having obtained the necessary key, take a few steps to the east, and you will find a locked grate here – interact with it and use the item you found earlier. As a result, you will open access to a small room.
Go inside and pick up the spirit carp floating here – It will be enough for tall characters to simply jump to collect the particle.