The bus has step up inside it aa?

I sometimes take the u623 bus, I notice a couple of steps to get in n out, it's so not oku-friendly, don't think it's a scania, a Chinese bus I think. Why do they have that?

Lowered down like when bus stops to take in/out passengers?

I remember when i was in london a few years ago, the bus will lower on one side, even got platform come out so that wheelchair ppl can easily get in/out. Like that, kampung?