Infringement dispute over a utility model patent between China International Marine Containers (Group) Ltd, Qingdao-based CIMC Reefer Container Manufacturing Co., Ltd, Qingdao-based CIMC Special Refrigeration Equipment Co., Ltd, Guangdong-based Fuhua Machinery Equipment Manufacturing Co., Ltd, Nanning-based Xinjinhang Materials Co., Ltd and Guangxi-based Baise No.1 Agricultural Development Co., Ltd