Always use traditional Chinese, otherwise people will think that you are not enthusiastic about this job, or that you have not done corresponding research on the company. Moreover, many Hong Kong people can't read simplified Chinese characters, and the people who interview you should all be Hong Kong people. If they can't read your resume, it will seriously affect your interview results.

Secondly, I think English resumes should be paid more attention than Chinese resumes. Hong Kong people attach great importance to English ability, and both written and spoken English are very important. Many companies in Hong Kong communicate in English!

Come on, good luck in the interview.