You may not always make money by applying for a patent, but you may also make a lot of money. Patents must have market prospects and be converted into market value in order to make money. It costs several hundred to more than 1,000 yuan to apply for a patent, and several hundred to more than 1,000 yuan to hire an agency. Patent applications should generally be illustrated with drawings, and you can ask someone to draw the drawings according to your own wishes. Applying for a patent does not require turning an idea into a finished product, but it is better to make a finished product to test. It is of course a waste to spend money on applying for a patent without making any money. However, some places encourage invention and innovation and may provide a small subsidy for patent application fees upon declaration.