This announcement is a separate document:
当升科技：中信建投证券股份有限公司关于北京当升材料科技股份有限公司2023年度内部控制评价报告的核查意见
Dangsheng Technology: CITIC Construction Investment Securities Co., Ltd.\'s inspection opinion on the 2023 internal control evaluation report of Beijing Dangsheng Material Technology Co., Ltd.
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