Generally speaking, if you wish to study in Hong Kong and you do not have right of abode or right to land in Hong Kong, you need to apply for a HKSAR student visa.
Website: https://www.studentvisa.hku.hk/
Contact: https://www.studentvisa.hku.hk/contact-us
You may also contact the Admissions Office of the Registry at https://www.studentvisa.hku.hk/contact-us for further enquiries
It is the responsibility of individual students to maintain a valid and legitimate visa status throughout their studies at HKU. Should there be any circumstantial or personal changes leading to the termination of the student’s prevailing visa status, the concerned student is required to report the changes immediately to the HK Immigration Department and to apply for a fresh visa for study. Pursuing study without a valid visa is a breach of law.
Non-local Students who have extended their study or whose limit of stay is shorter than the duration of their study programme should apply for a visa extension 4 weeks before their limit of stay expires. It is the responsibility of individual students to renew their visa in a timely manner to maintain a valid and legitimate visa status throughout their study at HKU.
Please refer to the website studentvisa.hku.hk for details and procedures. You may also contact AAL at visa-mainland@hku.hk (for Mainland Chinese students) or visa-overseas@hku.hk (for overseas/Macao/Taiwan students) for further enquiries