I think the photo above is dated, here is what it looked like in April. As you can see they dropped First / Business class and changed ‘Long stay’ to LTR. Since a couple months they usually have an immigration officer there that by default tries to keep people out. Even with my LTR and separate APEC card at one time I was refused, probably IO ignorance. 9/10 it works just fine. No queues, and multiple booths.
Mind you, over on the departure side it still has ‘Long stay’ as well as F and J class. 🤷