Qingdao Wenrun Holding Co., Ltd. dake cikin Qingdao kasar Sin kwararre ne na rufin rufin da mai tsara tsarin tafki kuma mai kaya.Muna mayar da hankali kan samarwa da kasuwa na PVC TPO da EPDM membrane don tsarin rufin, EPDM liner don tsarin kandami.A lokaci guda muna ba da sabis na tsayawa ɗaya na kayan haɗi masu alaƙa (tef ɗin kabu, tef ɗin murfi, kaset ɗin gyara, kusurwar da aka riga aka tsara, magudanar ruwa, scupper, fastener, faranti, mashaya ƙarewa, mashaya U, injin walda, kayan aikin shigar da sauransu) da walƙiya don guda ɗaya. ply rufin tsarin, kore rufin tsarin, photovoltaic rufi tsarin da kandami anti-seepage tsarin.