Guide to linking your existing progress/account in the mobile client to Steam client
 

Forewarning and The Why

Infinite Lagrange's Steam build is a sham when it comes to account management and linking. There is no button in-game to view/swap/bind account information, so you will have to do everything on your phone. This is really stupid. I hope they just… add the damn button.
 
 
In short: If you have mobile game data, this is a must. Do not start completely new if you do.
 
 
 

The How

 
Before opening Steam, you should complete the following steps on your mobile device:
 
1 – Open the game and stay on the title screen.
 
2 – Click on the person icon at the top left. This will open the NetEase account management.