1. Understand Yu Hua's research fields and directions, and determine whether his research interests match them.

2. Understand the enrollment requirements and admission standards of Yu Hua's school or research institution, including academic qualifications, achievements, scientific research experience, English proficiency and other requirements.

3. Prepare application materials, including resumes, research plans, letters of recommendation, etc.

4. After passing the preliminary examination of the application materials, an interview or written examination may be required.