We are well aware that the supply of raw materials has a significant influence on the quality of the finished product. As a result, we have placed a high value on raw material. We require all our suppliers to submit test reports to ensure that all material we receive from them meet our quality standards. Our in-house test department inspects and test each lot material to ensure their compliance with our standard. In order to properly evaluate our suppliers, our procurement department,quality control department and finance department perform a comprehensive supplier review, which includes assessment of the supplier's material quality, supply stability, and safety as well as environmental protection. If a supplier fails to achieve our desired performance standard, we will stop purchasing from such supplier.