Qingdao Wenrun Holding Co., Ltd. iherereye muri Qingdao mu Bushinwa ni igisenge cyumwuga hamwe n’ibishushanyo mbonera by’ibidengeri kandi bitanga isoko.Twibanze ku musaruro nisoko rya PVC TPO na EPDM membrane ya sisitemu yo hejuru, EPDM liner ya sisitemu yicyuzi.Mugihe kimwe, dutanga serivise imwe yo guhagarika ibikoresho bifitanye isano (kaseti ya kaseti, kaseti itwikiriye, kaseti yo gusana, inguni yabugenewe, imiyoboro y'amazi, scupper, yihuta, amasahani, akabari ko kurangiriraho, U bar, imashini zo gusudira, gushiraho ibikoresho nibindi) no kumurika kuri kimwe ply sisitemu yo hejuru, sisitemu yicyatsi kibisi, sisitemu yo hejuru ya Photovoltaque na sisitemu yo kurwanya seepage.