China Overseas Science & Trade Co., Ltd. is located in Beijing, China. We manufacture and export all kinds of chemical products for construction field, and we also import some chemical materials. We have specialized in construction chemical raw materials for many years, and have had a good reputation in this line. Our company have built three factorie in China mainland, our products both have higher quality and lower price, exporting to many countries, for example, Vietnam, Austrilia, Indian, Indonesia *****