If you're set on Marketing Management jobs in Central Hong Kong, there aren't very many at present: we count 4. Have you tried neighbouring regions? Two main themes in this field include Public Relations jobs and Promotion And Marketing Communications jobs. School yourself in skills like Marketing, Marketing Strategy, and Digital Marketing as they are commonly seen in many at present available job ads.
A significant percentage (25%) of Marketing Management jobs are at present seeking junior staff. Could you fill one of some 1 positions? There aren't at present any internship positions available in this area. With just one startup in this area, larger companies control a large section of this area. At the top of the page, you can see a map of offices in the region.