Adama Huifeng Company is a well-known enterprise mainly engaged in the comprehensive R&D, production and sales of pesticide technical materials, intermediates and formulations. It is the patentee of Chinese Invention Patent No. CN200910034132.5 (filing date: August 31, 2009, title: "Insecticidal composition containing pymetrozine", hereinafter referred to as the '1325 Patent). The '1325 Patent is legally valid. Claims 1 to 2 thereof define an insecticidal composition, which are specifically described as follows:

1. A binary compound insecticidal composition, characterized in that the active component A is pymetrozine, the active component B is one selected from acephate, imidaclothiz and dinotefuran, and the weight ratio of active component A to active component B is 1-10:10-1. 2. The insecticidal composition according to claim 1, characterized in that the cumulative weight ratio of the two active components accounts for 2.5-95% of the total weight of the agent. In recent years, Adama Huifeng Company has discovered that pymetrozine·dinotefuran insecticides manufactured, sold and offered for sale by certain entities and individuals fall within the protection scope of the '1325 Patent. To safeguard its legitimate rights and interests, Adama Huifeng Company entrusted Caihe Law Firm to conduct evidence collection and legal rights protection. Through the efforts of Caihe Law Firm, some of the targeted infringers have recently reached settlement agreements with Adama Huifeng Company.