19 October 2009 Geological Society of Trenchless Technology Committee meeting was held in Shanghai, executive director of my unit as one of the units of 16 invited to participate in this meeting. 
        Units of the meeting to executive director of the management practices, constitution of the association, the National Trenchless Technology Person of the Year and other contents of the council, vice president of GE extended over the company was honored to be invited to this meeting, the pipeline repair techniques for a detailed explanation , including: U-HDPE France and Africa excavation restoration, reversal method of trenchless rehabilitation technologies, extrusion coating method of trenchless repair technology principles, technical characteristics and process.