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How about proofing in the printing and dyeing factory?

The working environment of proofing is better than the workshop, because proofing does not need such a big place. The salary for starting to learn proofing is about 1000. If you learn it, you will get ahead. I used to know a guy who worked in a printing and dyeing factory with a salary of more than 5000 yuan, but he studied for five years before he got such good experience. Can you persist?