The company's application to be listed on the Science and Technology Innovation Board of Shanghai Equity Custody and Exchange Center has passed the examination, and has obtained the Notice of Consent for Sandi Construction Engineering Technology (Shanghai) Co., LTD. To be listed on the Science and Technology Innovation Board (Shanghai Stock Exchange (2021) No. 473) issued by Shanghai Equity Custody and Exchange Center. The Company will be listed on the Science and Technology Innovation Board of Shanghai Equity Custody Exchange Center on November 10, 2021. Stock name: Sandi Engineering, stock code: 300448 Listing prospectus and attachments have been published on os.china-see.com, designated information technology platform of Shanghai Equity Trusteeship Trading Center, on November 9, 2021 for investors to check Min. This is hereby announced.