DL China Distance Education Holdings Limited

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: May 18, 2017

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Exhibit 99.1

China Distance Education Holdings Limited Reports Financial Results for Second Quarter Fiscal Year 2017

BEIJING — May 17, 2017 — China Distance Education Holdings Limited (NYSE: DL) (“CDEL”, or the “Company”), a leading provider of online education in China focusing on professional education, today announced unaudited financial results for the second quarter of fiscal year 2017 ended March 31, 2017.

Second Quarter Fiscal 2017 Financial and Operational Highlights

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Mr. Zhengdong Zhu, Chairman and CEO of CDEL, said, “The second quarter revenue decline of 9.5% year-over-year was within our guidance range. Key factors contributing to the second quarter revenue decline include (i) the previously disclosed suspension of the Accounting Certificate Exam; (ii) the Tax Agent Qualification Exam being held only in November 2017, instead of both February and November in 2016, which will defer enrollments for the related courses to the second half of fiscal 2017; and (iii) lower cash receipts from licensed pharmacist test preparation premium courses in fiscal 2016, resulting in a year-over-year decline in revenue that was recognized in the second quarter of fiscal 2017 upon the release of the licensed pharmacist exam results in the second quarter. Although the above factors in aggregate significantly impacted our second quarter revenue, we are pleased to report that our cash receipts from online course registration grew 24.7% year-over-year in the second quarter, driven primarily by strong growth in cash receipts in our accounting and healthcare verticals. We are also pleased to report that for the six month period ending March 31, 2017, our total cash receipts from online course registration grew 12.9% year-over-year.”

Mr. Zhu added, “In the second quarter, we continued to execute on our strategic growth initiatives, including K-12 teacher continuing education, mobile related products, Big Data solutions, College Cooperation Program, and employment guidance services for accounting professionals. In particular, our focus on employment guidance services for accounting professionals, which bundle accounting practical skills training and employment guidance services, is beginning to bear fruit. Furthermore, we look forward to pursuing complementary acquisition and strategic investment opportunities that will enhance our business model, and further our effort to position China Distance Education as the premier life-long learning partner for our students.”

Mr. Mark Marostica, Co-Chief Financial Officer of CDEL, said, “As expected, the revenue decline in our second quarter resulted in a net loss in the quarter. The loss was partly due to the impact of Xiamen NetinNet in its seasonally weak second quarter and the foreign currency exchange loss. Given the strong growth in cash receipts from online course registration in the second quarter, we anticipate returning to profitability in our third quarter of fiscal 2017. With our peak enrollment season now underway, we aim to continue to proactively manage expenses while maintaining operating efficiency, with a goal of balancing our growth and profitability.”

Second quarter Fiscal 2017 Financial Results

Net Revenue. Total net revenue decreased by 9.5% to $21.9 million in the second quarter of fiscal 2017 from $24.1 million in the second quarter of fiscal 2016. Net revenue from online education services, books and reference materials, and other sources contributed 77.2%, 5.8% and 17.0%, respectively, of total net revenues for the second quarter of fiscal 2017.

Online education services. Net revenue from online education services decreased by 11.2% to $16.9 million in the second quarter of fiscal 2017 from $19.0 million in the second quarter of fiscal 2016. This decrease was mainly due to (i) the previously disclosed suspension of the Accounting Certificate Exam; (ii) the Tax Agent Qualification Exam being held only in November 2017, instead of both February and November in 2016, which will defer enrollments for the related courses to the second half of fiscal 2017; (iii) lower cash receipts from licensed pharmacist test preparation premium courses in fiscal 2016, resulting in a year-over-year decline in revenue that was recognized in the second quarter of fiscal 2017 upon the release of the licensed pharmacist exam results in the second quarter.

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Books and reference materials. Net revenue from books and reference materials decreased by 19.2% to $1.3 million in the second quarter of fiscal 2017 from $1.6 million in the second quarter of fiscal 2016.

Other revenues . Net revenue from other sources increased by 4.2% to $3.7 million in the second quarter of fiscal 2017 from $3.6 million in the second quarter of fiscal 2016, primarily due to Xiamen NetinNet’s revenue contribution of $0.9 million, partially offset by a decline in revenue from business start-up training services.

Cost of Sales. Cost of sales increased by 13.3% to $11.8 million in the second quarter of fiscal 2017 from $10.4 million in the second quarter of fiscal 2016. Non-GAAP ¹ cost of sales increased by 13.3% to $11.8 million in the second quarter of fiscal 2017 from $10.4 million in the second quarter of fiscal 2016. This increase was primarily due to expenses associated with Xiamen NetinNet, as well as increased salaries and related expenses. This increase was partially offset by decreased cost of books and reference materials.

Gross Profit . Gross profit decreased by 26.7% to $10.1 million in the second quarter of fiscal 2017 from $13.7 million in the prior year period. Non-GAAP ¹ gross profit decreased by 26.7% to $10.1 million in the second quarter of fiscal 2017 from $13.8 million in the prior year period. Gross margin was 46.0% in the second quarter of fiscal 2017, compared with 56.9% in the second quarter of fiscal 2016. Non-GAAP ¹ gross margin was 46.2% in the second quarter of fiscal 2017, compared with 57.0% in the second quarter of fiscal 2016.

Operating Expenses. Total operating expenses increased by 43.5% to $13.1 million in the second quarter of fiscal 2017 from $9.1 million in the prior year period. Non-GAAP ¹ total operating expenses increased by 46.0% to $12.6 million in the second quarter of fiscal 2017 from $8.7 million in the prior year period.

Selling expenses. Selling expenses increased by 60.7% to $8.4 million in the second quarter of fiscal 2017 from $5.2 million in the prior year period. Non-GAAP ¹ selling expenses increased by 61.0% to $8.4 million in the second quarter of fiscal 2017 from $5.2 million in the prior year period. The increase was primarily driven by increased salaries and related expenses, and increased advertising and promotional expenses, together with expenses associated with Xiamen NetinNet.

General and administrative expenses. General and administrative expenses increased by 20.1% to $4.6 million in the second quarter of fiscal 2017 from $3.9 million in the prior year period. Non-GAAP ¹ general and administrative expenses increased by 23.2% to $4.2 million in the second quarter of fiscal 2017 from $3.4 million in the prior year period. The increase was mainly due to expenses associated with Xiamen NetinNet.

Income Tax Benefit /(Expense). Income tax benefit was $0.6 million in the second quarter of fiscal 2017 compared with income tax expense of $0.7 million in the prior year period, primarily due to the operating loss recorded in the second quarter.

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Net Income /(Loss). As a result of the foregoing, net loss was $2.4 million in the second quarter of fiscal 2017 compared with net income of $2.5 million in the prior year period. Non-GAAP ¹ net loss was $1.9 million in the second quarter of fiscal 2017 compared with non-GAAP net income of $3.0 million in the prior year period.

Operating Cash Flow . Net operating cash inflow decreased by 6.2% to $11.3 million in the second quarter of fiscal 2017 from $12.0 million in the prior year period. The operating cash inflow was mainly attributable to the cash receipts from online course registration generated in the second quarter of fiscal 2017. This operating cash inflow was partially offset by the increase in prepayment and other current assets, and decrease in accrued expenses and other liabilities, and income tax payable.

Cash and Cash Equivalents, Term Deposits, Restricted Cash and Short-term Investments . Cash and cash equivalents, term deposits, restricted cash and short-term investments as of March 31, 2017 decreased by 6.1% to $99.6 million from $106.1 million as of December 31, 2016, mainly due to the dividend payment of $14.7 million, certain strategic investments of $3.8 million, and capital expenditures of $0.7 million. This decrease was partially offset by cash flow of $11.3 million generated from operating activities in the second quarter of fiscal 2017.

First Six Months of Fiscal 2017 Financial Results

Net Revenue. Total net revenue increased by 11.0% to $53.8 million in the first six months of fiscal 2017 from $48.5 million in the first six months of fiscal 2016. Net revenue from online education services, books and reference materials, and other sources contributed 68.7%, 5.4% and 25.9%, respectively, of total net revenues for the first six months of fiscal 2017.

Online education services. Net revenue from online education services was $37.0 million in the first six months of fiscal 2017, a 3.2% decrease from $38.2 million in the first six months of fiscal 2016.

Books and reference materials. Net revenue from books and reference materials decreased by 13.4% to $2.9 million in the first six months of fiscal 2017 from $3.4 million in the first six months of fiscal 2016.

Others . Net revenue from other sources increased by 100.6% to $13.9 million in the first six months of fiscal 2017 from $7.0 million in the first six months of fiscal 2016.

Cost of Sales. Cost of sales increased by 11.7% to $24.6 million in the first six months of fiscal 2017 from $22.0 million in the first six months of fiscal 2016. Non-GAAP ¹ cost of sales increased by 11.7% to $24.5 million in the first six months of fiscal 2017 from $21.9 million in the first six months of fiscal 2016.

Gross Profit . Gross profit increased by 10.4% to $29.2 million in the first six months of fiscal 2017 from $26.5 million in the prior year period. Non-GAAP ¹ gross profit increased by 10.3% to $29.3 million in the first six months of fiscal 2017 from $26.6 million in the prior year period. Gross margin was 54.3% in the first six months of fiscal 2017, compared with 54.6% in the first six months of fiscal 2016. Non-GAAP ¹ gross margin was 54.4% in the first six months of fiscal 2017, compared with 54.8% in the first six months of fiscal 2016.

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Operating Expenses. Total operating expenses increased by 33.8% to $24.8 million in the first six months of fiscal 2017, from $18.5 million in the prior year period. Non-GAAP ¹ total operating expenses increased by 35.8% to $23.9 million in the first six months of fiscal 2017, from $17.6 million in the prior year period.

Selling expenses. Selling expenses increased by 46.4% to $15.6 million in the first six months of fiscal 2017 from $10.7 million in the prior year period. Non-GAAP ¹ selling expenses increased by 46.6% to $15.6 million in the first six months of fiscal 2017 from $10.6 million in the prior year period.

General and administrative expenses. General and administrative expenses increased by 16.8% to $9.2 million in the first six months of fiscal 2017 from $7.9 million in the prior year period. Non-GAAP ¹ general and administrative expenses increased by 19.4% to $8.3 million in the first six months of fiscal 2017 from $7.0 million in the prior year period.

Income Tax Expense. Income tax expense increased by 6.0% to $1.8 million in the first six months of fiscal 2017 from $1.7 million in the prior year period.

Net Income. As a result of the foregoing, net income decreased by 7.6% to $6.1 million in the first six months of fiscal 2017 from $6.7 million in the prior year period. Non-GAAP ¹ net income decreased by 7.0% to $7.1 million in the first six months of fiscal 2017 from $7.7 million in the prior year period.

Operating Cash Flow . Net operating cash inflow increased by 19.2% to $29.0 million in the first six months of fiscal 2017 from $24.3 million in the prior year period.

Outlook

For the third quarter of fiscal 2017, the Company expects to generate total net revenue in the range of $30.8 million to $32.3 million, representing a year-over-year increase of approximately 0% to 5%.

The above guidance reflects the Company’s current and preliminary view, which is subject to change.

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A telephone replay will be available approximately two hours after the call until May 25, 2017 by dialing:

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

About China Distance Education Holdings Limited

China Distance Education Holdings Limited is a leading provider of online education in China focusing on professional education. The courses offered by the Company through its websites are designed to help professionals seeking to obtain and maintain professional licenses and to enhance their job skills through our professional development courses in China in the areas of accounting, healthcare, engineering & construction, and other industries. The Company also offers other professional education courses for the national judicial examination, online test preparation courses for self-taught learners pursuing higher education diplomas or degrees, test preparation courses for university students intending to take the nationwide graduate school entrance exam, and online language courses. The Company also offers third-party developed online courses through its Online Open Learning Platform, a proprietary education platform that allows people to share their educational content or deliver live courses online. For further information, please visit http://ir.cdeledu.com.

Safe Harbor Statement

This announcement contains forward-looking statements. These statements are made under 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,” “may,” “should,” “potential,” “continue,” “expect,” “predict,” “anticipate,” “future,” “intend,” “plan,” “believe,” “is/are likely to,” “estimate” and similar statements. Among other things, the outlook for the third quarter of fiscal year 2017 and quotations from management in this announcement, as well as the Company’s strategic and operational plans (in particular, the anticipated benefits of strategic growth initiatives, including the College Cooperation Program, K-12 teacher continuing education, mobile related products, Big Data solutions, bundling accounting practical skills training and employment guidance services, as well as acquisition and strategic investments) contain forward-looking statements. The Company may also make written or oral forward-looking statements in its periodic and annual reports to the SEC, 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 statements about the Company’s beliefs 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: goals and growth strategies; future prospects and market acceptance of the Company’s courses and other products and services; future business development and results of operations; projected revenues, profits, earnings and other estimated financial information; projected enrollment numbers; plans to expand and enhance courses and other products and services; competition in the education and test preparation markets; and Chinese laws, regulations and policies, including those applicable to the Internet, Internet content providers, the education and telecommunications industries, mergers and acquisitions, taxation and foreign exchange.

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Further information regarding these and other risks is included in the Company’s annual report on Form 20-F and other documents filed or furnished with the SEC. All information provided in this press release is as of the date of this press release. The Company does not undertake any obligation to update any forward-looking statement, except as required under applicable law.

Statement Regarding Unaudited Financial Information

The unaudited financial information set forth in this press release is preliminary and subject to adjustments. Adjustments to the financial statements may be identified when audit work is performed for the year-end audit, which could result in significant differences from this preliminary unaudited financial information.

Use of Non-GAAP Financial Measures

To supplement the Company’s consolidated financial results presented in accordance with U.S. generally accepted accounting principles, or GAAP, the Company uses the following measures defined as non-GAAP financial measures: non-GAAP net income, operating income, gross profit, cost of sales, selling expenses, general and administrative expenses, net income margin, operating margin, gross profit margin and basic and diluted earnings per ADS and per share. The presentation of these non-GAAP financial measures is not intended to be considered in isolation or as a substitute for the financial information prepared and presented in accordance with GAAP. For more information on these non-GAAP financial measures, please see the table captioned “Reconciliations of non-GAAP measures to comparable GAAP measures” set forth at the end of this release.

The Company believes that these non-GAAP financial measures provide meaningful supplemental information regarding its performance and liquidity by excluding share-based compensation expenses. However, non-GAAP financial measures may not be indicative of the Company’s operating performance from a cash perspective. The Company believes that both management and investors benefit from these non-GAAP financial measures in assessing its performance and when planning and forecasting future periods. These non-GAAP financial measures also facilitate management’s internal comparisons to the Company’s historical performance and liquidity. The Company computes its non-GAAP financial measures using the same consistent method from quarter to quarter. The Company believes these non-GAAP financial measures are useful to investors in allowing for greater transparency with respect to supplemental information used by management in its financial and operational decision making. A limitation of excluding share-based compensation expenses from the above-mentioned line items and presenting these non-GAAP measures is that such charges may continue to be for the foreseeable future a significant recurring expense in our business. Management compensates for this limitation by providing specific information regarding the GAAP amounts excluded from each non-GAAP measure. The accompanying table at the end of this release provides more detail on the reconciliations between GAAP financial measures that are most directly comparable to non-GAAP financial measures.

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Note 1: Each ADS represents four ordinary shares

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Note 1: Each ADS represents four ordinary shares.

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