  The voting system in the Legislative Council of Hong Kong (Legco) is
sometimes unicameral and sometimes bicameral, depending on whether the bill is
proposed by the Hong Kong government. Therefore, although without any
representative within Legco, the Hong Kong government has certain degree of
legislative power --- as if there is a virtual representative of the Hong Kong
government within the Legco. By introducing such a virtual representative of
the Hong Kong government, we show that Legco is a three-dimensional voting
system. We also calculate two power indices of the Hong Kong government through
this virtual representative and consider the $C$-dimension and the
$W$-dimension of Legco. Finally, some implications of this Legco model to the
current constitutional reform in Hong Kong will be given.
