There are several points here I believe.
1) I cannot comment on the age of the woman with the ruler – the images are not distinct enough for that, but it is true that Asian women age much more slowly than their counterparts. The fact the few of them drink or smoke, plus their diets, may be a big factor in this, in addition to genes.
2) One of the things that struck me was how unruly the classes seemed to be. There’s a lot of background noise in all the clips, most of which comes from the pupils. I was surprised by this, since having spent a fair bit of time around the Far East, I had only ever seen schoolchildren (or pupils as we now seem to have to call them), behaving in a very quiet way. Maybe the western influence has permeated into their schools now.