[(1) NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Viking Global Investors LP _____________________________________________________________________________ (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) [ ] (b) [x] _____________________________________________________________________________ (3) SEC USE ONLY _____________________________________________________________________________ (4) CITIZENSHIP OR PLACE OF ORGANIZATION Delaware _____________________________________________________________________________ NUMBER OF (5) SOLE VOTING POWER 0 SHARES ______________________________________________________________ BENEFICIALLY (6) SHARED]

[2. Check the Appropriate Box if a Member of a Group (See Instructions): 3. 4. Citizenship or Place of Organization: Number of Shares Beneficially Owned by Each Reporting Person With 5. Sole Voting Power: 0 6. Shared Voting Power: 0 7. Sole Dispositive Power: 0 8. Shared Dispositive Power: 0 9. Aggregate Amount Beneficially Owned by Each Reporting Person: 10.]

[SCHEDULE 13G QUNAR CAYMAN ISLANDS LIMITED (Name of Issuer) Class B ordinary shares (Title of Class of Securities) 74906P1049** (CUSIP Number) December 31, 2015 (Date of Event Which Requires Filing of this Statement) o Rule 13d-1(b) o Rule 13d-1(c) x Rule 13d-1(d) * The remainder of this cover page shall be filled out for a reporting person's initial filing on]

[SCHEDULE 13G (Amendment No. 1)* Qunar Cayman Islands Limited (Name of Issuer) Ordinary shares of par value of $0.001 per share (Title of Class of Securities) 74906P 1049 (CUSIP Number) December 31, 2015 (Date of Event which Requires Filing of this Statement) ☐ Rule 13d-1(b) ☐ Rule 13d-1(c) ☒ Rule 13d-1(d) *The remainder of this cover page shall be filled]