How about Zibo xinhua medical instruments? As a mechanical engineer for product development. Is there a penalty or something? How is the treatment?

It's still hard to meet someone who understands and is willing to answer your questions. If you have the opportunity to go to the company for an interview, you can learn more about the working environment and the working face of employees. It's best to talk to employees alone or ask people nearby, such as the owner of a small shop, on the pretext of knowing the actual work content, because this information is more objective and true. Everything is true only if it has been experienced. Good luck with your work.