Mien Trung Mineral Joint Stock Company Ltd Nghi Xá, Nghi Lộc District, Nghe An, Vietnam mtm.com.vn VIETNAM Hebei Jingxin Chemical Group Co., Ltd 1000 Jingheng N St, Taocheng Qu, Hengshui Shi, Hebei Sheng, China, 053000 www.hebeijx.cn CHINA HP Chemicals JSC No 1, Cau Binh ro...