The Responsible Minerals Initiative (RMI) research discovered that rebel groups in the Democratic Republic of Congo and neighboring countries in Central Africa use forced labor, child labor, and other illegal means to mine tungsten, tin, tantalum, gold, cobalt, and mica, and sell them in exchange for weapons, thereby causing regional instability. Minerals obtained through illegal means are referred to as conflict minerals. Tungsten, tin, tantalum, gold, cobalt, and mica are essential for the functions of electronic products. To avoid the use of conflict minerals obtained from illegal operations, we have established the Responsible Mineral Procurement Policy and the Due Diligence Investigation on Conflict Minerals of Suppliers. Delta also organized webinars to communicate directly with suppliers and help them understand Delta's targets for joint implementation. In the due diligence investigations of suppliers, we disclosed and required suppliers to gradually shift purchases of minerals to qualified refineries. Delta will include mica, which has received more attention from stakeholders, in the scope of due diligence investigation.
We use the CMRT 6.22 and EMRT 1.11 template for conversion into online questionnaires and the most recently updated list of refineries announced by RMI for the overall assessment. According to the investigation, Delta's supply chain sourced materials from 431 refineries in 2022, including 431 which were included in the most recently updated list of qualified refineries. According to the analysis, most of the qualified refineries are located in Asia while others are located in Europe.