Invention patents take a long time to be authorized, usually three to five years, but because they need to go through the substantive examination process, the patent rights after patent authorization are very stable; utility model patents and design patents do not need to go through substantive examination. The review process is faster and authorization is faster. Utility models can generally be authorized within 6 to 12 months from the date of application, and designs can generally be authorized within 6 months from the date of application. The patent certificate can be obtained 3 months after authorization.