Hi
Indeed, I found no such words in <Visa Office Specific Instructions - Beijing>. It looks like different CHC have different descriptions on Medical exam...
From the Beijing specific instructions
Instructions for this examination will be provided after your application has been assessed by a Canadian
Visa officer.After you receive the necessary medical forms, you and your family members must undergo the necessary
medical examinations with one of the doctors on the list of panel doctors, unless you and/or your family
members live in a country not included on this list. If you wish to have your medical examinations in a
country not included on this list, please inform us and we will ensure that you receive the appropriate
list.