[CTRIP.COM INTERNATIONAL, LTD. [ · representing [ · (par value US$0.01 per share) Underwriting Agreement [ · J.P. Morgan J. P. Morgan Securities LLC (“ 383 Madison Avenue New York, New York 10179 Morgan Stanley Morgan Stanley & Co. International plc (“ 25 Cabot Square Canary Wharf London E14 4QA United Kingdom As the several Underwriters listed in Schedule 1] [001-33853 CTRIP.COM INTERNATIONAL, LTD. 968 Jin Zhong Road Shanghai 200335, People’s Republic of China Form 20-F x Form 40-F o o o EXPLANATORY NOTE 2 CTRIP.COM INTERNATIONAL, LTD.]

[Ctrip.com International, Ltd. Announces Proposed Offering of 22,500,000 American Depositary Shares SHANGHAI, September 6, 2016 — Ctrip.com International, Ltd. (Nasdaq: CTRP), a leading travel service provider of accommodation reservation, transportation ticketing, packaged tours and corporate travel management in China (“Ctrip” or the “Company”), today announced the commencement of the offering of 22,500,000 American depositary shares (the “ADSs”), each representing 0.125] [Ctrip.com International, Ltd. Announces Proposed Offering of US$750 Million Convertible Senior Notes SHANGHAI, September 6, 2016 — Ctrip.com International, Ltd. (Nasdaq: CTRP), a leading travel service provider of accommodation reservation, transportation ticketing, packaged tours and corporate travel management in China (“Ctrip” or the “Company”), today announced that it proposes to offer up to US$750 million in aggregate principal amount of] [001-33853 CTRIP.COM INTERNATIONAL, LTD. 968 Jin Zhong Road Shanghai 200335, People’s Republic of China Form 20-F x o o o CTRIP.COM INTERNATIONAL, LTD.]

[QuickLinks -- Click here to rapidly navigate through this document Consent of Independent Registered Public Accounting Firm We consent to the reference to our firm under the caption "Experts" in the Registration Statement (Form F-3 No. 333-208399) and related Prospectus of Ctrip.com International, Ltd. and to the incorporation by reference therein of our report dated April 14, 2016, with respect] [QuickLinks -- Click here to rapidly navigate through this document Six-month Six-month Six-month RMB RMB US$ Revenues: Accommodation reservation 2,056,220,713 3,389,849,328 510,066,256 Transportation ticketing 2,000,458,455 3,952,429,921 594,717,032 Packaged-tour 725,286,233 1,030,426,993 155,047,020 Corporate travel 213,459,763 262,728,423 39,532,407 Others 113,366,310 306,098,841 46,058,298 Total revenues 5,108,791,474 8,941,533,506 1,345,421,013] [QuickLinks -- Click here to rapidly navigate through this document QUNAR CAYMAN ISLANDS LIMITED Page 1 Consolidated balance sheets as of December 31, 2014 and 2015 Consolidated statements of comprehensive loss for the years ended December 31, 2013, 2014 and 2015 Consolidated statements of cash flows for the years ended December 31, 2013, 2014 and 2015 Consolidated statements of shareholders'] [QuickLinks -- Click here to rapidly navigate through this document UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL INFORMATION Ctrip.com International, Ltd. ("Ctrip" or the "Company") owned ordinary shares of Qunar Cayman Islands Limited ("Qunar") representing approximately 45% of Qunar's aggregate voting interest, after completing the share exchange transaction with Baidu, Inc. as announced on October 26, 2015. After the Company's issue] [CTRIP.COM INTERNATIONAL, LTD. 968 Jin Zhong Road ý o Form 20-F EXPLANATORY NOTE CTRIP.COM INTERNATIONAL, LTD. Xiaofan Wang]

[Ctrip Reports Unaudited Second Quarter of 2016 Financial Results Shanghai, China, Aug 31, 2016 - Ctrip.com International, Ltd. (Nasdaq: CTRP), a leading travel service provider of accommodation reservation, transportation ticketing, packaged tours and corporate travel management in China (“Ctrip” or the “Company”), today announced its unaudited financial results for the second quarter ended June 30, 2016. Highlights for the Second] [001-33853 CTRIP.COM INTERNATIONAL, LTD. 99 Fu Quan Road Shanghai 200335, People’s Republic of China Form 20-F x o o o CTRIP.COM INTERNATIONAL, LTD. By :]