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Investor Presentaiton

China - SAMR Process Overview II-VI Phase Submission Timing 12/29/2018 Pre-Registration No maximum length of time Period Registration Phase I Phase II Phase III Expected late February Registration Date + 30 days Registration Date + 120 days Registration Date + 180 days SAMR Activity SAMR requests additional information from parties SAMR registers the filing SAMR conducts preliminary review and contacts third parties SAMR requests additional information based on review and third party responses SAMR continues review of the transaction Page 21

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