1. Fierce competition: Because public health centers have stable work and a certain social status, the competition for this position will be fierce. There will be many people with similar or even better conditions to apply for this position, which makes candidates need to have higher professional skills and quality to stand out.

2. High threshold: The medical record department needs to handle a large amount of medical information and medical records, so the requirements for contract workers will be higher. Hospitals will be more inclined to recruit candidates with relevant professional background and certain work experience, which also makes the threshold for applying relatively high.

3. Strict recruitment process: The recruitment process of public health centers is usually very strict, including resume screening, written examination and interview. Each link requires the applicant to have excellent performance before entering the next link, which also increases the difficulty of entering the position.