Short version - they don't care about their customers!
I tried to dine here on three separate occasions knowing the food is most likely still good. But this third time (and last) has completely turned me off this place entirely.
They're generally pretty busy, give out numbers to be fair to customers waiting. On two of the three occasions, I have seen empty tables not occupied just left empty and at the same time people piling up at the door waiting for their number to be called. The most frustrating part, is people walking in, seeing others waiting, spotting the empty table and just taking it - literally by passing the number system. The waiters have even seen this and said nothing to enforce their own number system, nor defending the people already waiting and actually giving them a menu and tea. I've seen this happen twice now.
If you're going to put a system in place to be fair to your customers (first come-first serve system) you should abide by it and enforce it. I'm severely disappointed that they didn't say or do anything and will not ever be dining here again.
Before the only issue was slow service (which probably created the wait) but pretending to turn a blind eye to someone jumping the line (for a system you put into place) is stupid and tells me you don't actually care about your customers getting fair treatment.