Not too difficult - send email to their admission officer with your details. They will get back with info like (1) whether they have seats available; (2) how to arrange interviews (Skype) and written test (can use your existing school in HK, or use an agent like AA as exam centre (about HKD800 for written exam and Skype)). You can ask all sort of questions by email or just call them direct. The most important part is - how to choose the schools!