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Exhibit 99.1 4.5 Billion Parcels Expanded Market Share to 20.4 % Adjusted Net Income Increased 23.1 % to Reach RMB781.6 Million ZTO Reports First Quarter 2021 Unaudited Financial Results SHANGHAI , May 19 , 2021 / PRNewswire / - ZTO Express ( Cayman ) Inc. ( NYSE : ZTO and SEHK : 2057 ) , a leading and fast - growing express delivery company in China ( “ ZTO ” or the “ Company ” ) , today announced its unaudited financial results for the first quarter ended March 31 , 2021 [ 1 ] . The Company delivered a parcel volume growth of 88.5 % and expanded market share by 1.5 percentage points to 20.4 % while maintaining high quality of service and customer satisfaction . Adjusted net income beat market expectations by growing 23.1 % to reach RMB781.6 million . Cash generated from operating activities was RMB477.0 million . First Quarter 2021 Financial Highlights Revenues were RMB6,472.5 million ( US $ 987.9 million ) , an increase of 65.3 % from RMB3,915.9 million in the same period of 2020 . Gross profit was RMB1,096.5 million ( US $ 167.4 million ) , an increase of 33.9 % from RMB818.7 million in the same period of 2020 . Net income was RMB533.5 million ( US $ 81.4 million ) , an increase of 43.8 % from RMB371.0 million in the same period of 2020 . Adjusted EBITDA [ 2 ] was RMB1,468.1 million ( US $ 224.1 million ) , an increase of 25.1 % from RMB1,173.4 million in the same period of 2020 . Adjusted net income [ 3 ] . was RMB781.6 million ( US $ 119.3 million ) , an increase of 23.1 % from RMB635.1 million in the same period of 2020 . Basic and diluted earnings per American depositary share ( “ ADS ” [ 4 ] ) were RMB0.64 ( US $ 0.10 ) , an increase of 33.3 % from RMB0.48 in the same period of 2020 . Adjusted basic and diluted earnings per American depositary share [ 5 ] attributable to ordinary shareholders were RMB0.94 ( US $ 0.14 ) , an increase of 14.6 % from RMB0.82 in the same period of 2020 . Net cash provided by operating activities was RMB477.0 million ( US $ 72.8 million ) , compared with RMB177.8 million in the same period of 2020 . Operational Highlights for First Quarter 2021 Parcel volume was 4,475 million , an increase of 88.5 % from 2,374 million in the same period of 2020 . Number of pickup / delivery outlets was approximately 30,000 as of March 31 , 2021 . Number of direct network partners was over 5,350 as of March 31 , 2021 . Number of line - haul vehicles was over 10,450 as of March 31 , 2021 , which included over 10,050 self - owned vehicles and approximately 400 vehicles owned and operated by Tonglu Tongze Logistics Ltd. , a transportation operator that works exclusively for ZTO . Out of the over 10,050 self - owned trucks , over 8,100 were high capacity 15 to 17 - meter - long models as of March 31 , 2021 , compared to approximately 7,900 as of December 31 , 2020 . Number of line - haul routes between sorting hubs was over 3,650 as of March 31 , 2021 , compared to over 3,600 as of December 31 , 2020 . Number of sorting hubs was 95 as of March 31 , 2021 , among which 84 are operated by the Company and 11 by the Company's network partners . ( 1 ) ( 2 ) An investor relations presentation accompanies this earnings release and can be found at http://zto.investorroom.com . Adjusted EBITDA is a non - GAAP financial measure , which is defined as net income before depreciation , amortization , interest expenses and income tax expenses , and further adjusted to exclude the shared - based compensation expense and non - recurring items such as the gain on disposal of equity investment and subsidiary which management aims to better represent the underlying business operations . ( 3 ) Adjusted net income is a non - GAAP financial measure , which is defined as net income before share - based compensation expense and non- recurring items such as gain on disposal of equity investment and subsidiary in which management aims to better represent the underlying business operations . ( 4 ) ( 5 ) One ADS represents one Class A ordinary share . Adjusted basic and diluted earnings per American depositary share attributable to ordinary shareholders is a non - GAAP financial measure . It is defined as adjusted net income attributable to ordinary shareholders divided by weighted average number of basic and diluted shares , respectively . 1