How to sign in to PSN when playing a PlayStation game on PC (Vietnam)

Frequently asked questions 

What are the benefits of signing in to PSN on a PC?
By signing in to PSN on your PC, you can access unique bonus content, manage your communication preferences, and receive the latest news, updates, and offers about your game and other upcoming PlayStation Studios games on PC or other PlayStation platforms. 

Do I have to sign in to PSN to play a PlayStation game on PC?
Signing in to PSN is optional when playing a PlayStation game on PC. 

Do I have to sign in to PSN for each PlayStation game on PC?
No. Once you have synced your account for PlayStation Network for one game, it is synced for the other PlayStation games on PC. If you unlink your account, it is unlinked for all games.