Xi'an Yuanya Import and Export Trading Co., Ltd. is headquartered in the Inland Free Trade Port Area of Xi'an, China. We are a professional import and export company with routes connecting Germany, the United States, Japan, South Korea, and Russia. Coal is a non renewable resource. Coal is a solid combustible mineral gradually formed by ancient plants buried underground through complex biochemical and physicochemical changes. It is a solid combustible organic rock, mainly formed from plant remains through biochemical processes, burial, and geological transformation. Commonly known as coal. China is the first country in the world to utilize coal.