1. academic performance: first of all, you need to have good academic performance. Usually, applying for graduate students requires a bachelor's degree, and the undergraduate score should be above excellent. In addition, you need to provide transcripts and degree certificates as application materials.

2. English ability: The teaching language of City University of Hong Kong is English, so you need to have good English ability. You usually need to provide English test scores, such as TOEFL or IELTS, to prove your English level. Specific score requirements can be found in the school official website.

3. Research plan: During the application process, you need to submit a research plan. This is a description of your interest and research direction in the research field you are applying for. You need to clearly explain your research objectives, methods and expected results, and provide relevant literature review.

4. Letter of recommendation: You need to provide two or three letters of recommendation, which should be written by your professor or tutor. A letter of recommendation should describe your academic ability and research potential in detail and provide specific examples to support your application.

5. Personal statement: You need to write a personal statement introducing your background, educational experience and personal achievements. You can emphasize your passion and motivation for psychology and mention your internship or research experience in related fields.

6. Other materials: According to the requirements of the school, it may be necessary to provide other materials, such as identity certificates and passport photos. Please be sure to prepare all necessary materials according to the requirements of the school.