Publishing in a regular publishing house requires at least a full-time bachelor degree or above. Due to the particularity of this industry, employees must also have relevant qualifications. Usually only students majoring in publishing are enrolled. If you want to do publishing work, you need a bachelor's degree or above, and you also need the primary or intermediate certification of the "Publishing Professional Professional Qualification Examination". This exam is unified throughout the country, twice a year. Please consult the press and publication bureau of this province for details.
Of course, if you are just a proofreader, the requirements are relatively low, as long as you have a bachelor's degree and primary vocational qualification certification, you can be competent. However, the ability of course does not mean that you will be admitted. The publishing house is a state-owned enterprise, and it is difficult for anyone to enter. Good luck! I'm from this industry, and I can continue to ask questions if I need help. Glad to help you!