Every time I admire these "photo cards" (since we use the Penguin Logistics theme here), I felt like those characters in movie who almost faint due to the sheer amazingness of each art. Also I like it when the artists flex their skill.

Sadly I only have few screenshots from the event, man if only we could access the event page again...

Update: YESS the website still live, and yes you need to log in to your Yostar account: Arknights 4th Anniversary