Qingdao Wenrun Holding Co., Ltd. located in Qingdao China is a professional roof and pond system designer and supplier. We focus on the production and market of PVC TPO and EPDM membrane for roof system, EPDM liner for pond system. At the same time we provide one stop service of related accessories (seam tape, cover tape, repair tapes, prefabricated corner, drainage, scupper, fastener, plates, termination bar, U bar, welding machines, installing tools etc) and flashing for single ply roof system, green roof system, photovoltaic roof system and pond anti-seepage system.