Article 11 After the patent right for invention and utility model is granted, except as otherwise provided in this Law, no unit or individual may exploit the patent without the permission of the patentee, that is, it may not manufacture, use, promise to sell, sell or import the patented product for production and business purposes, nor may it use the patented method and use, promise to sell, sell or import the product directly obtained according to the patented method.
After the design patent is granted, no unit or individual may exploit its patent without the permission of the patentee, that is, it may not manufacture, promise to sell, sell or import its patented product for production and business purposes.
Judging from your description, it can only be a patent issue, involving the provisions of Chapter II of the Patent Law granting patent rights. Or the issue of patent ownership (see which one can get the patent in the end), which involves the provisions on patent ownership in Articles 6-9 of the Patent Law.