According to this form, if you work for the government, regardless of which level of government and your grade, you should check the box "government official". Government official = civil servant = public servant = government employee. I understand that this may not help with your visa application but this is what you should choose if you are to answer this question truthfully.
We all live abroad here in Canada, and you should know that to white Canadians, all Asians are aliens, whether you are from HK, Mainland China, Japan, Korea, etc. To them we are all the same, and inferior. .
