All non-local students are bound by the limit of stay stated in their student visa. Staying beyond the allowed period in Hong Kong will be considered as a breach of the immigration regulations.
Please check your student visa and exit Hong Kong before the date stated in your student visa. Some foreign passport holders may enter Hong Kong as a tourist on a visa-free basis.
If you need to stay in Hong Kong for a longer period, you may exit Hong Kong before your student visa expires and re-enter as a tourist. Please check the websites of the Hong Kong Immigration Department or the ministry of foreign affairs of your home country to confirm the visa requirements.