If you mean the University of Hong Kong, you can. The University of Hong Kong has an application channel for international students, and there is no need for college entrance examination results. In other words, it is also possible for you to apply as an international student and provide language scores and sat. You must select this identity when applying. If you choose inland candidates, you need college entrance examination results.
However, it should be noted that not all universities in Hong Kong can do this. Some schools do not allow mainland students to register as international students, so they can only use the results of the college entrance examination, and the University of Hong Kong can.