As for the "invention patent", the invention patent has passed a series of rigorous examination, especially the examination of novelty, creativity and practicality, including product invention and method invention. Because determining uniqueness before authorization is a strict search, it will take a long time and be difficult in general authorization. So "invention patent" can be understood as an idea that others have not applied for before. You should make sure that you have never applied. Therefore, before applying for a patent for invention, you'd better search for the patent and make a preliminary decision.
If it is a better idea, you can also consider applying for an invention patent and using a new patent at the same time, which is safer.