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Hong Kong Exchanges and Clearing Limited and The Stock Exchange of Hong Kong Limited take no responsibility for the contents of this announcement , make no representation as to its accuracy or completeness and expressly disclaim any liability whatsoever for any loss howsoever arising from or in reliance upon the whole or any part of the contents of this announcement . CHINA TOWER 中国 铁塔 China Tower Corporation Limited 中國 鐵塔 股份有限公司 ( A joint stock company incorporated in the People's Republic of China with limited liability ) ( Stock Code : 0788 ) UNAUDITED KEY PERFORMANCE INDICATORS FOR THE FIRST QUARTER OF 2021 Operating revenue was RMB21,151 million , up by 7.4 % over the same period last year , of which Revenue from TSP business was RMB19,822 million , up by 4.6 % over the same period last year , of which , revenue from tower business was RMB18,836 million , up by 3.9 % over the same period last year ; revenue from indoor distributed antenna system ( " DAS " ) business was RMB986 million , up by 20.4 % over the same period last year Revenue from trans - sector site application and information ( “ TSSAI ” ) business was RMB879 million , up by 55.3 % over the same period last year Revenue from energy operation business was RMB377 million , up by 225.0 % over the same period last year EBITDA was RMB15,553 million Profit attributable to owners of the Company was RMB1,694 million , up by 16.7 % over the same period last year The board of directors ( the “ Board ” ) of China Tower Corporation Limited ( the “ Company ” ) announces certain selected unaudited consolidated key financial and operating data of the Company for the period ended 31 March 2021 . 1