Fire Wall,
Thanks for the suggestion but to be a dependent you need to be married. The section before the bit you posted says:
For a sponsor who is a Hong Kong permanent resident or a resident who is not subject to a limit of stay (i.e. a resident with the right to land or on unconditional stay), the following dependants may apply to join him/her for residence in Hong Kong:
- his/her spouse;
- his/her unmarried dependent children under the age of 18; and
- his/her parent aged 60 or above.
Will look into the domestic helper idea.