"三十歳能自供自給、有盈餘供養父母、付得起生活上一些奢侈品、對我自己來講、巳算立了。" I totally agree. If 立 = independence, I personally believe 30 is a very lenient threshold - Honestly, once you graduated and off to work (18-22), that's the real threshold for independence - You are on your own and no more subsidies from parents.
In the western world it is common for children to become independent of their parents once they reach their 18th. However in HK, it is not uncommon for parents to still be supporting their kids well past their 20s.
Now that you mention independence, isn't it ironic that parents in HK actually stifle their children's independence by providing far too much, but not giving them the room to grow?
It can't be applied for all western world. I get the information from news before, and know that many Italian not being married and they are living with their parents.
I don't know the other cases in Europe, and seems that it can't be applied for all western countries.
It is difficult to make comparison as we have difference situation. Or I can say that many HKG ppls will give money to their parents every month, this money can let me to rebnt a house