well......education sector in HK doesn't pay good and has good stability anymore as before.
There are way less babies now, and thus less students, and less teachers.
If talking about secondary school, the teaching post will go to those with a good traditional background first, i.e. those from a famous traditional secondary school, and then study in HKU/CUHK/HKUST, and then PGDE afterwards........
a taught master has much less weight than a bachelor.