Gross profit and pure profit economy of manufacturing industry

Because I have dandruff. Hello. No matter how bad the manufacturing industry is, the gross profit (profit from main business) is still around 15%, and the net profit (net profit) depends on your company's cost control, that is, "if you can't open source, you must cut down." Generally around 5-7%. The gross profit and net profit of catering industry are relatively high, with gross profit of about 40% and net profit of about 15-20%.