STEP 1 
Install steam to your PC/laptop
https://store.steampowered.com/


STEP 2
Log in your steam account


STEP 3
Open library


STEP 4
Click 'add a game' to add genshin impact game to steam account


STEP 5
Click 'add a non-steam game'


STEP 6
Click browse and click the 2 arrow


STEP 7
Right click genshin impact game and click 'open file location'


STEP 8
Click 'Genshin impact game'


STEP 9

Right click and copy the link


STEP 10
Open steam back and paste the link 


STEP 11
Click 'GenshinImpact' and click open


STEP 12
Tick the game and click 'add selected programs'


STEP 13
Click steam and open setting

STEP 14
Click controller

STEP 15
Open 'General controller settings'

STEP 16
For X3 gamepad it's will come out as Generic gamepad .
Tick Guide Button and Genereric Gamepad Configuration.
If you want setting the gamepad button you can click define layout.

STEP 17
After check the  gamepad connection ,exit the steam and refresh the page.

STEP 18
Right click steam app and run as administrator.

STEP 19
Open steam big picture mode

STEP 20
click library

STEP 21
open the install game

STEP 22
play the genshin impact game (if you play it for first time the controller might not connected)

STEP 23
Open setting

STEP 24
Change the control to controller

STEP 25
If you can't press anything after change the control just exit the game and steam.


STEP 26
Open the steam back and click controller option

STEP 27
Untick 'allow desktop configuration in launcher' and click OK


STEP 28
If you see the message on the right side of your screen it's means the gamepad already connected with the game

STEP 29
if the you see the gamepad button it means the gamepad successfully  connected with your game

STEP 30
go to setting

STEP 31
if you want to change the gamepad button go to controller setup.


ENJOY THE GAME!!!