October 8 to 10, I was invited to send representatives to participate in the China University of Geosciences (Wuhan) China and the U.S. held in trenchless technology exchange meetings with U.S. counterparts and share their pipe repair technology, both sides learn from each other and experience in advanced technology . 
     The meeting strengthened the pipeline repair technology and foreign exchange, import and increased domestic repair technique. This will advance the development of pipe restoration technology, far-reaching impact.