I want to make a list to compare support for elderly carers in different places. Could you please tell me more about the specific content of the carer support service?

Glad to be helpful. You may find the information you want on the website as follows.
https://www.swd.gov.hk/en/index/site_pubsvc/page_elderly/sub_csselderly/id_carersuppo/

Thank you so much! I really appreciate all of your help. May I also ask that where can I get more information?

Sure. According to the introduction on the SWD website, the scope of carer support service including:
-Skill-training and educational programs
-self-help and mutual support groups
-resource corner
-simple counseling and referral services
-information giving and supply of reference materials relating to the care of older adults
-demonstration/loan of rehabilitation-aid equipment
-social and recreational activities