This announcement is a separate document:
北京大华国际会计师事务所（特殊普通合伙）关于对天津银龙预应力材料股份有限公司会计政策、会计估计变更的专项说明
Beijing Dahua International Accounting Firm (Special General Partnership) Special Notice on Changes in Accounting Policies and Accounting Estimates of Tianjin Yinlong Prestressed Materials Co., Ltd.
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