The SWD has bought places from private Residential Care Homes for Persons with Disabilities (RCHDs) to encourage private RCHDs to upgrade their service standards, to increase the supply of subsidised residential care places and to help the market develop more service options for persons with disabilities. 

You can refer to the following Social Welfare Department website.

Bought Place Scheme for Private Residential Care Homes for Persons with Disabilities

The source of information is provided by the Social Welfare Department