What are the contents of the lawyer's letter on design patent infringement?

Contents of patent infringement lawyer's letter: * * law firm accepts the entrustment of * * * and assigns * * * lawyers to handle patent infringement between your company and * * *. Based on the investigation and combined with relevant laws and regulations, this lawyer wrote: * * * is the patentee of * * *, and * * was appointed on July 20 10. The products sold by your company in the market have seriously infringed the patent right of the patentee.