11% 7% 89% 93% 100% 100% 2016 2017 2018 100% 80% 60% 40% 20% 0% Due Diligence(DD) ASEH designed its DD measures to conform to the Organization for Economic Co-operation and Development Due Diligence Guidance for Responsible Supply Chains of Minerals from Conflict-Affected and High-Risk Areas (the "OECD Guidance") and we also adopted the OECD Guidance to not only identify / assess supplier risks and mitigate these identified risks, but also to design a conflict minerals audit form for ASEH's suppliers.