First of all, applying for the University of Hong Kong requires IELTS or TOEFL scores. You need to contact the University of Hong Kong for specific scores. From now on, you should spend more time on English.
Second, you need to prepare your research report, which is equivalent to our graduation thesis. This should be carefully prepared ... It can't be copied and pasted in China, which is generally very important for your successful application.
Third, you need the recommendation of your current school teacher, preferably 2-3 people, and then you need to contact your tutor at the University of Hong Kong to accept it, or it will be convenient for you to have a teacher with the best academic exchange there. If not, you can only send your grades and papers and your teacher's recommendation letter there. You need to contact and consult yourself. If there are teachers there who are willing to accept you, you are not far from success.
I hope my answer is helpful to you, and I wish you good luck ~