According to the official web site of the Hong Kong Police Service, on both it's Rank and Promotion page
and Organization Chart page
both Chief Superintendent (CSP) and Senior Superintendent (SSP) are extant ranks in the service.
According to your Wikipedia reference, the traditional Chinese and insignia are:
Comparing to British Police Services, there is considerable variation in the gazetted ranks between for example Scotland Yard, London Police, and Metropolitan Police. This is to be expected, with the size and responsibility
of the various services varying considerably - the larger forces having an additional rank or two at the top level.
Note that while City of London has just 5 ranks above Chief Inspector, the Metropolitan Police and Scotland Yard have 7. Hong Kong also has just 5, the same as City of London, befitting a force of similar size and responsibility. Northern Ireland also has 5, while the Isle of Man has only three. It's less about the precise names for the gazetted ranks, though the common history clearly shows, but rather the responsibilities.