Shandong Shuangyi Group is a modernized enterprise which is integrated with design, manufacture and service of composite material products. Shuangyi Group Covers total area of 210,000 square meters, we have four productions bases: Headquarters of Shandong Shuangyi Group Co.,Ltd.(South Factory) North Factory Qingzhou Branch Company of Shuaangyi Group LingxianBranch Company of Shuangyi Group We have passed ISO90012008, ISO14001-2004,