Do all invitations require an invitation code?

Not necessarily, depending on which invitation method you choose.

Currently there are several invitation options:

1. Create a sharing link: new users who register through your sharing link and save the resources you shared will automatically be bound to the invitation relationship. There is no need to enter an invitation code.
2. Post Invitation Link: New users who install PikPak App through the invitation link provided by you will be automatically bound to the invitation relationship.
3. Post Invitation Code: After new users register PikPak account, manually enter your invitation code within 12 hours, it will bind the invitation relationship.