Is it illegal to sign a patent and apply for subsidies?

Not illegal. According to the regulations issued by the Ministry of Education of People's Republic of China (PRC), it is strictly forbidden to find someone to substitute for classes, write homework, papers and patents. However, if you sign on behalf of the patentee and apply for subsidies, it is not illegal, because it is approved by the patentee himself and you need to keep relevant certificates. Patent is the abbreviation of patent right, which is the right granted by the state to the applicant to monopolize, use and dispose of his invention and creation within a certain period of time according to the patent law.