Captains can download the PC client now on our official site! You may log into the PC client after the version update is completed!
Captain can login the existing game accounts (need to link with HoYoverse Pass in advance) on PC version! Make it clear, all game progress can be continued~
More info:
Ai-chan's Newsflash - HI3 for PC FAQ
Ai-chan's Newsflash - PC Version Control Configuration Guide