The Company is committed to the concept of sustainable development of green procurement. In order to reduce the environmental impact of suppliers, the Group requires partners to comply with the "QC080000:2017 Toxic and Hazardous substances Management System" standards and the requirements of laws and regulations. Partners are requested to sign the "Environmental Protection Agreement" and "Environmental Compliance Statement". Strict audits and monthly evaluations are carries out on suppliers. Meanwhile, the Group also regularly requires suppliers to provide RoHS2.0, halogen test reports and material safety data sheets (MSDS) to ensure effective assessment of environmental compliance. For incoming raw materials, the quality control department of the Group regularly conducts X-ray fluorescence spectroscopic analysis and inspection according to high, medium and low risk levels. In 2021, the Group conducted toxic and harmful substance management system audit on 16 key material suppliers, and the pass rate reached 100%, which effectively reduced the environmental risks from the supply chain.