This is a prior product, so your design does not have the novelty of patent, that is, whether others apply for a patent or not, you have no right to apply for a patent. Even if you do, you are authorized (the appearance patent has not been verified, so long as the format is ok, you are authorized), but if there is a patent dispute, your patent can easily be declared invalid.
An application for a patent is a request for a patent right for an invention or design made by an inventor, designer or other entitled subject to the Patent Office. According to the provisions of China's patent law, an application for a patent shall be submitted to the Patent Office with an application, specification, patent claim, abstract, drawings and a request for priority. Among them, drawings and priority claims are not necessary for every application.
But it is beneficial to patent application. A patent application shall be in written form, mainly including the following contents: the name of the request, invention or design, the name and identity of the applicant, and the name and identity of the agent.