Hong Kong law requires every private limited company to assign a company secretary, which will become the primary in-charge of various administrative and reporting legal compliances. These legal compliances include the filing of annual return, and recording and filing of board resolution.
If the company secretary is an individual, they are required to reside in Hong Kong. If the company secretary is a body corporate, they are required to be registered and operating in Hong Kong.
A sole director / shareholder can not represent the company as company secretary.