It was established officially on 12 July 1950 as a branch of the British Red Cross Society in Hong Kong. Since 1 July 1997, upon the transfer of Hong Kong's sovereignty to the People's Republic of China, the Hong Kong Red Cross has changed its affiliation to become a special branch of the Red Cross Society of China, but remains autonomous from it. Unlike other Red Cross and Red Crescent societies worldwide, which are notable for their humanitarian effort, Hong Kong Red Cross is better known for blood transfusion in Hong Kong. This may be due to a few disasters threatening and political turmoils in the territory, also its long history of service from 1952. The blood transfusion service runs under the Hospital Authority.