We are a key member of PetroChina stock corporation and is the exclusive foreign trade windows of PetroChina, Petrochina Stock is one of an extra large size enterprises in china with bussiness activities of prospecting and exploiting, oil refining, pertrochemicals chemicals production weaves and some attachments of weaves and sales based on our own product. We Qingdao chinaoil Co., Ltd handles the import and export bussiness based on the supply and purchase from more than 100 manufactures of our...