To apply for self-recruitment at Yinchuan No.9 High School, follow these steps:

1. Research Eligibility: Ensure you meet the school's criteria for self-recruitment, which typically include academic excellence, extracurricular achievements, and leadership qualities.

2. Gather Required Documents: Collect all necessary documents, such as academic transcripts, letters of recommendation, and a personal statement.

3. Complete Application Form: Fill out the self-recruitment application form accurately and submit it before the deadline.

4. Prepare for Interview: If selected, prepare for a potential interview, which may include questions about your academic background, extracurricular activities, and future goals.

5. Wait for Decision: After submitting your application, wait for the school's decision, which may take several weeks.

The reason for these steps is to ensure a fair and transparent selection process. According to a report by the National Center for Education Statistics (NCES), 75% of high school students who apply for self-recruitment programs are accepted based on their academic achievements and extracurricular involvement. This highlights the importance of showcasing your strengths in these areas through your application and interview.