1. First of all, if Ruixing's clerks want to change careers as clerks, they need to evaluate their skills, knowledge and interests to see if they are suitable for changing careers as clerks or office workers.

2. Secondly, prepare the resume and cover letter of the clerical position. If there is a lack of skills in paperwork, you can acquire the necessary skills through self-study or training.

Finally, send your resume and cover letter to the company to express your interest and adaptability to the position.