Appeal procedure of appearance patent infringement.
1. It should be that the other party applied for a utility model or an appearance patent for the product and complained about your infringement on the relevant platform.
2, the utility model and appearance can be authorized without substantive examination, so it is entirely possible for the other party to apply for a patent for your product and sue you for infringement.
This behavior is suspected of maliciously applying for patent protection and should not be protected by law. You can seek legal aid through proper channels.
4. It is suggested to apply for patent protection for your product design as soon as possible to avoid similar situations.