Exhibit 99.1

ZTO Reports First Quarter 2025 Unaudited Financial Results

Parcels Volume Increased 19.1% to 8.5 Billion

Adjusted Net Income Grew 1.6% to RMB2.3 Billion

Annual Volume Guidance Reiterated to Grow 20%-24%

SHANGHAI, May 21, 2025/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, 2025[1]. The Company grew parcel volume by 19.1% year over year while maintaining high quality of service and customer satisfaction. Adjusted net income[2] increased 1.6% to reach RMB2.3 billion. Net cash generated from operating activities was RMB2.4 billion.

First Quarter 2025 Financial Highlights

Operational Highlights for First Quarter 2025

Mr. Meisong Lai, Founder, Chairman and Chief Executive Officer of ZTO, commented, “During the first quarter, ZTO maintained leading service quality and achieved 8.5 billion of parcel volume and 2.3 billion of adjusted net income. Retail volume increased by 46% year over year for the quarter as we penetrated deeper into reverse logistics, and we continued to work closely with various e-commerce platform and enterprise customers to develop differentiated products and services which include time-definite delivery and customized KA consumer services.”

Mr. Lai added, “We believe competition in China’s express delivery industry has reached the “white-hot” stage, and it is further exacerbated by a greater portion of volume being either low value or loss-making for the logistic service providers. Our approach to network policies has been on maintaining consistency and cultivating long-term stability. At times of fierce competition, we are learning to better leverage our existing competitive advantage and at the same time, stay focused on initiatives that can bring about long-term prospects of profitable growth.”

Ms. Huiping Yan, Chief Financial Officer of ZTO, commented, “ZTO’s core express ASP decreased by 11 cents largely driven by 16 cents in higher volume incentives and 6 cents lower weight average per parcel partially offset by 12 cents increase in KA unit price. Combined unit sorting and transportation costs decreased 9 cents thanks to cost productivity gain initiatives. SG&A as a percentage of revenue was 4.7%. Cash flow from operating activities was 2.4 billion, and capital spending was 2 billion.”

Ms. Yan added, “Volume, backed by high quality of services, remains our top priority. Healthier profitability by the ZTO brand and its network partners relative to our peers are built upon decades of interdependent and cooperative relationship founded on our “shared success” philosophy. Achieving a reasonable level of corporate earnings, and at the same time, laying the groundwork and support our franchise partners to maintain confidence in long-term prospects, to reengineer last mile delivery processes and hereby reduce costs, and to increase their couriers’ share into retail profit, our concerted effort will forge new competitive advantage to expand ZTO’s volume leadership.”

Total Revenues were RMB10,891.5 million (US$1,500.9 million), an increase of 9.4% from RMB9,960.0 million in the same period of 2024. Revenue from the core express delivery business increased by 9.8% compared to the same period of 2024, as a net result of a 19.1% growth in parcel volume and a 7.8% decrease in parcel unit price. KA revenue, generated by direct sales organizations, increased by 129.3% driven by increase in e-commerce return parcels. Revenue from freight forwarding services decreased by 11.6% compared to the same period of 2024 mainly due to declining cross-border e-commerce pricing. Revenue from sales of accessories, largely consisted of sales of thermal paper used for digital waybills' printing, increased by 15.5%. Other revenues were derived mainly from financing services.

Total cost of revenues was RMB8,202.2 million (US$1,130.3 million), an increase of 17.9% from RMB6,957.9 million in the same period last year.

Line haul transportation cost was RMB3,483.1 million (US$480.0 million), an increase of 3.3% from RMB3,371.5 million in the same period last year. The unit transportation cost decreased 12.8% or 6 cents mainly attributable to better economies of scale, improved load rate and more effective route planning.

Sorting hub operating cost was RMB2,314.6 million (US$319.0 million), an increase of 6.8% from RMB2,168.2 million in the same period of last year. The increase primarily consisted of (i) RMB109.9 million (US$15.2 million) increase in labor-associated costs partially offset by automation-driven efficiency and (ii) RMB69.2 million (US$9.5 million) increase in depreciation and amortization costs associated with equipment and facilities. Sorting hub operating cost per unit decreased 10.0% or 3 cents as automation and standardization in operating procedures plus effective performance evaluation continued to dig deep for productivity gain. As of March 31, 2025, there were 631 sets of automated sorting equipment in service, compared to 461 sets as of March 31, 2024.

Cost of accessories sold was RMB133.3 million (US$18.4 million), increased by 0.2% compared with RMB133.0 million in the same period last year.

Other costs of RMB2,098.5 million (US$289.2 million), increased 91.3% from RMB1,096.8 million in the same period last year, which included an increase of RMB957.4 million (US$131.9 million) for serving higher-valued enterprise customers.

Gross Profit was RMB2,689.2 million (US$370.6 million), decreased by 10.4% from RMB3,002.1 million in the same period last year. Gross margin rate was 24.7% compared to 30.1% in the same period last year.

Total Operating Expenses were RMB283.8 million (US$39.1 million), compared to RMB735.4 million in the same period last year.

Selling, general and administrative expenses were RMB737.5 million (US$101.6 million), decreased by 17.7% from RMB896.6 million in the same period last year. The decrease consisted of a RMB109.1 million (US$15.0 million) decrease in compensation and benefit expenses. Excluding a RMB37.3 million one-time charge in the same period last year for loss on collection with a supplier, the decrease was 14.2% year over year.

Other operating income, net was RMB453.7 million (US$62.5 million), compared to RMB161.3 million in the same period last year. Other operating income mainly consisted of (i) RMB407.6 million (US$56.2 million) of government subsidies and tax rebates, and (ii) RMB35.9 million (US$4.9 million) of rental and other income.

Income from operations was RMB2,405.4 million (US$331.5 million), an increase of 6.1% from RMB2,266.7 million for the same period last year. The operating margin rate was 22.1% compared to 22.8% in the same period last year.

Interest income was RMB198.4 million (US$27.3 million), compared with RMB245.0 million in the same period last year.

Interest expenses was RMB68.9 million (US$9.5 million), compared with RMB83.9 million in the same period last year.

Gain from fair value changes of financial instruments was RMB36.6 million (US$5.0 million), compared with a gain of RMB42.7 million in the same period last year. Such gain or loss from fair value changes of the financial instruments is quoted by commercial banks according to market-based estimation of future redemption prices.

Income tax expenses were RMB531.6 million (US$73.3 million) compared to RMB566.3 million in the same period last year. Taxable income for the same period last year reflected a RMB478.4 million non-tax-deductible impairment losses on investment in Cainiao Smart Logistics Network Limited upon a tender offer repurchase.

Net income was RMB2,039.2 million (US$281.0 million), which increased by 40.9% from RMB1,447.7 million in the same period last year.

Basic and diluted earnings per ADS attributable to ordinary shareholders were RMB2.50 (US$0.34) and RMB2.44 (US$0.34), compared to basic and diluted earnings per ADS of RMB1.77 and RMB1.75 in the same period last year, respectively.

Adjusted basic and diluted earnings per ADS attributable to ordinary shareholders were RMB2.77 (US$0.38) and RMB2.71 (US$0.37), compared with RMB2.74 and RMB2.68 in the same period last year, respectively.

Adjusted net income was RMB2,259.3 million (US$311.3 million), compared with RMB2,224.0 million during the same period last year.

EBITDA1 was RMB3,466.6 million (US$477.7 million), compared with RMB2,884.1 million in the same period last year.

Adjusted EBITDA was RMB3,686.7 million (US$508.0 million), compared to RMB3,660.4 million in the same period last year.

Net cash provided by operating activities was RMB2,363.0 million (US$325.6 million), compared with RMB2,031.0 million in the same period last year.

Recent Developments

Change of Board Composition

The Board of Directors of the Company (the “Board”) has announced the following changes, effective April 25, 2025: Ms. Di Xu has been appointed as a director, and Mr. Xudong Chen has resigned from his position as a director. The Company confirms that Mr. Chen’s resignation was not related to any disagreement with the Company.

Company Share Repurchase Program

The Board has approved its share repurchase program in November 2018 and made subsequent modifications, whereby the latest modification increased the aggregate value of shares that may be repurchased to US$2.0 billion and extended the effective period through June 30, 2025. As of March 31, 2025, the Company had purchased an aggregate of 50,899,498 ADSs for US$1,228.3 million on the open market, including repurchase commissions. The remaining funds available under the share repurchase program are US$771.7 million.

On May 20, 2025, the Company announced to extend the current share repurchase program to June 30, 2026. The Company believes that the share repurchase program represents ZTO’s confidence in the overall market opportunities as well as ZTO’s solid operating fundamentals and financial strength for sustained profitable growth and value creation for its shareholders.

Business Outlook

Based on current market and operating conditions, the Company reiterates its 2025 parcel volume guidance of 40.8 billion to 42.2 billion, reflecting a 20% to 24% year over year growth. Such estimates represent management’s current and preliminary view, which are subject to change.

Exchange Rate

This announcement contains translation of certain Renminbi amounts into U.S. dollars at specified rates solely for the convenience of readers. Unless otherwise noted, all translations from Renminbi to U.S. dollars were made at the exchange rate of RMB7.2567 to US$1.00, the noon buying rate on March 31, 2025 as set forth in the H.10 statistical release of the Board of Governors of the Federal Reserve Systems.

Use of Non-GAAP Financial Measures

The Company uses EBITDA, adjusted EBITDA, adjusted net income, adjusted net income attributable to ordinary shareholders, and adjusted basic and diluted earnings per American depositary share attributable to ordinary shareholders, each a non-GAAP financial measure, in evaluating ZTO’s operating results and for financial and operational decision-making purposes.

Reconciliations of the Company’s non-GAAP financial measures to its U.S. GAAP financial measures are shown in tables at the end of this earnings release, which provide more details about the non-GAAP financial measures.

The Company believes that such Non-GAAP measures help identify underlying trends in ZTO’s business that could otherwise be distorted by the effect of the related expenses and gains that the Company includes in income from operations and net income. The Company believes that EBITDA, adjusted EBITDA, adjusted net income, adjusted net income attributable to ordinary shareholders and adjusted basic and diluted earnings per American depositary share attributable to ordinary shareholders provide useful information about its operating results, enhance the overall understanding of its past performance and future prospects and allow for greater visibility with respect to key metrics used by ZTO’s management in its financial and operational decision-making.

EBITDA, adjusted EBITDA, adjusted net income, adjusted net income attributable to ordinary shareholders and adjusted basic and diluted earnings per American depositary share attributable to ordinary shareholders should not be considered in isolation or construed as an alternative to net income or any other measure of performance or as an indicator of the Company’s operating performance. Investors are encouraged to compare the historical non-GAAP financial measures to the most directly comparable GAAP measures. EBITDA, adjusted EBITDA, adjusted net income, adjusted net income attributable to ordinary shareholders and adjusted basic and diluted earnings per American depositary share attributable to ordinary shareholders presented here may not be comparable to similarly titled measures presented by other companies. Other companies may calculate similarly titled measures differently, limiting their usefulness as comparative measures to ZTO’s data. ZTO encourages investors and others to review the Company’s financial information in its entirety and not rely on a single financial measure.

Conference Call Information

ZTO’s management team will host an earnings conference call at 8:30 PM U.S. Eastern Time on Tuesday, May 20, 2025 (8:30 AM Beijing Time on May 21, 2025).

Dial-in details for the earnings conference call are as follows:

Please dial in 15 minutes before the call is scheduled to begin and provide the passcode to join the call.

A replay of the conference call may be accessed by phone at the following numbers until May 27, 2025:

Additionally, a live and archived webcast of the conference call will be available at http://zto.investorroom.com.

About ZTO Express (Cayman) Inc.

ZTO Express (Cayman) Inc. (NYSE: ZTO and SEHK:2057) ("ZTO" or the "Company") is a leading and fast-growing express delivery company in China. ZTO provides express delivery service as well as other value-added logistics services through its extensive and reliable nationwide network coverage in China.

ZTO operates a highly scalable network partner model, which the Company believes is best suited to support the significant growth of e-commerce in China. The Company leverages its network partners to provide pickup and last-mile delivery services, while controlling the mission-critical line-haul transportation and sorting network within the express delivery service value chain.

For more information, please visit http://zto.investorroom.com.

Safe Harbor Statement

This announcement contains statements that may constitute "forward-looking" statements pursuant to the "safe harbor" provisions of the U.S. Private Securities Litigation Reform Act of 1995. These forward-looking statements can be identified by terminology such as "will," "expects," "anticipates," "aims," "future," "intends," "plans," "believes," "estimates," "likely to," and other similar expressions. Among other things, the business outlook and quotations from management in this announcement contain forward-looking statements. ZTO may also make written or oral forward-looking statements in its periodic reports to the U.S. Securities and Exchange Commission (the "SEC") and The Stock Exchange of Hong Kong Limited (the "HKEX"), in its interim and annual reports to shareholders, in announcements, circulars or other publications made on the website of the HKEX, in press releases and other written materials, and in oral statements made by its officers, directors, or employees to third parties. Statements that are not historical facts, including but not limited to statements about ZTO's beliefs, plans, and expectations, are forward-looking statements. Forward-looking statements involve inherent risks and uncertainties. A number of factors could cause actual results to differ materially from those contained in any forward-looking statement, including but not limited to the following: risks relating to the development of the e-commerce and express delivery industries in China; its significant reliance on certain third-party e-commerce platforms; risks associated with its network partners and their employees and personnel; intense competition which could adversely affect the Company's results of operations and market share; any service disruption of the Company's sorting hubs or the outlets operated by its network partners or its technology system; ZTO's ability to build its brand and withstand negative publicity, or other favorable government policies. Further information regarding these and other risks is included in ZTO's filings with the SEC and the HKEX. All information provided in this announcement is as of the date of this announcement, and ZTO does not undertake any obligation to update any forward-looking statement, except as required under applicable law.

UNAUDITED CONSOLIDATED FINANCIAL DATA

Summary of Unaudited Consolidated Comprehensive Income Data:

Unaudited Consolidated Balance Sheets Data:

Summary of Unaudited Consolidated Cash Flow Data:

The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the condensed consolidated balance sheets that sum to the total of the same such amounts shown in the condensed consolidated statements of cash flows:

Reconciliations of GAAP and Non-GAAP Results

Reconciliations of GAAP and Non-GAAP Results

For investor and media inquiries, please contact:

ZTO Express (Cayman) Inc.

Investor Relations

E-mail: ir@zto.com

Phone: +86 21 5980 4508