Cemented carbide and steel are the two main raw materials in the construction of rock bits. A steady supply of reliable raw material is a prerequisite to maintaining normal production runs and staying competitive among the competition. To that end, Yanggu built a subsidiary in Shandong province early on, which has grown to become the largest cemented carbide manufacturer in Northern China. Additionally, we've partnered up with world-renowned cemented carbide and steel suppliers to ensure our raw material quality is unbeatable. Thus far, we've signed a number of long-term supply agreements with Baosteel, Xining Special Steel, and Zhuzhou Hard Alloy Group. It is these companies that support our long-term success.