It depends on your kid's banding within 培正 .
==> If you are Band 1 student ==> 100%
==> If you are Band 2 student ==> Need to go through the lucky draw process
Let me be clear:
If you are a band 2 student in 培正, then you still need to go through the lucky draw process no matter your kid belongs to band 2 front or band 2 end. It means you still have chance of not promoting to 培正培正secondary school. Thus, actually you are not 輕鬆 at all in order to be band 1 student in 培正...