Exhibit 4.21
 EXECUTION VERSION




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TABLE OF CONTENTS
 ARTICLE ICERTAIN DEFINITIONS1.1
    
    Defined Terms
    
    
    11.2
    
    Interpretation and Rules of Construction
    
    
    6ARTICLE IIBOARD OF DIRECTORS2.1
    
    Number and Composition
    
    
    72.2
    
    Nomination and Election of Directors
    
    
    72.3
    
    Quorum and Manner of Acting
    
    
    92.4
    
    Chairman
    
    
    102.5
    
    Board Meetings
    
    
    102.6
    
    Board Committees
    
    
    112.7
    
    Execution of Documents
    
    
    112.8
    
    Compliance
    
    
    112.9
    
    Memorandum and Articles of Association
    
    
    11ARTICLE IIIRESTRICTIONS ON TRANSFER3.1
    
    Transfer Restrictions on Ordinary Shares
    
    
    123.2
    
    Permitted Transfers of Ordinary Shares
    
    
    123.3
    
    Right of First Offer
    
    
    13ARTICLE IVFINANCIAL STATEMENTS; ACCESS TO INFORMATION4.1
    
    Financial Statements
    
    
    154.2
    
    Access to Information
    
    
    164.3
    
    Confidentiality of Information
    
    
    164.4
    
    Cooperation
    
    
    16ARTICLE VTERM AND TERMINATION5.1
    
    Term
    
    
    165.2
    
    Termination
    
    
    16ARTICLE VILIABILITY6.1
    
    Limitation of Liability
    
    
    18
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ARTICLE VIIGOVERNING LAW; ARBITRATION7.1
    
    Governing Law
    
    
    187.2
    
    Arbitration
    
    
    18ARTICLE VIIIMISCELLANEOUS8.1
    
    Enforcement on Behalf of the Company
    
    
    198.2
    
    Entire Agreement; Amendments
    
    
    198.3
    
    Inspection
    
    
    198.4
    
    Waiver
    
    
    198.5
    
    Assignment
    
    
    208.6
    
    Severability
    
    
    208.7
    
    Remedies
    
    
    208.8
    
    Headings
    
    
    218.9
    
    Notices
    
    
    218.10
    
    Further Assurances
    
    
    228.11
    
    No Fiduciary Relationship
    
    
    228.12
    
    Counterparts
    
    
    22
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SHAREHOLDERS AGREEMENT
 SHAREHOLDERS AGREEMENT E-House SINA Company Party Parties
 RECITALS
 WHEREAS Ordinary Shares
 WHEREAS
 NOW, THEREFORE
 ARTICLE I  CERTAIN DEFINITIONS
 Defined Terms
 10% Shareholder
 Affiliate provided
 Affiliate Transferee




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Agreement
 Beneficial Owner
 Board
 Board Committee
 Business Day
 Chairman
 China Online
 Closing
 Company
 Contract
 Defaulting Party
 Dispute
 E-House
 E-House Directors
 E-House Group Shareholder
 Exchange
 Financial Investor
  2




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Counterparts
  GAAP
 General Meeting
 Governmental Authority
 HKIAC
 HKIAC Rules
 Information
 Law
 Lien
 Lock Up Period
 Major Shareholder
  3




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Majority of the Board
 Memorandum and Articles of Association
 Ordinary Shares
 Ordinary Shares Lock Up Period
 Party Parties
 Permitted Transfer
 Person
 Prohibited Transfer
 PRC
 Remaining RFO Ordinary Shares
 Representatives
 RFO Exercise
 RFO Notice
 RFO Offeree
 RFO Offeror
 RFO Ordinary Shares
 RFO Purchase Period
 RFO Response Period
 Right of First Offer
 Share Capital
  4




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Share Purchase Agreement
 Shareholders
 SINA
 SINA Directors
 SINA Group Shareholder
 SINA Intellectual Property
 SINA Software
 Subsidiary Subsidiaries
 Tax Taxes
  5




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Teleconference Facilities
 Transfer
 Transfer Period
 U.S. Dollars US$
 Interpretation and Rules of Construction
      6




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ARTICLE II  BOARD OF DIRECTORS
 Number and Composition E-House Directors SINA Directors
 Nomination and Election of Directors
   7




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8




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Quorum and Manner of Acting
  provided
   9




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Chairman
 Chairman
    Board Meetings
 provided
  10




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Board Committees
 Execution of Documents
 Compliance
 Memorandum and Articles of Association
  11




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ARTICLE III  RESTRICTIONS ON TRANSFER
 Transfer Restrictions on Ordinary Shares
 Lock Up Period
 provided Prohibited Transfer
  Permitted Transfers of Ordinary Shares Permitted Transfer
 Affiliate Transferee provided
  12




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provided
   Right of First Offer
 RFO Offeror provided
 RFO Notice RFO Offeree RFO Ordinary Shares
  13




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Right of First
Offer RFO
Exercise RFO Response Period pro rata pro rata Remaining RFO Ordinary Shares
 provided however , provided
 Transfer
Period provided however
  14




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provided provided
  ARTICLE IV  FINANCIAL STATEMENTS; ACCESS TO INFORMATION
 Financial Statements
  15




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Access to Information
 Confidentiality of Information
 Cooperation
 ARTICLE V  TERM AND TERMINATION
 Term provided
 16




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Termination Defaulting
Party
        17




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ARTICLE VI  LIABILITY
 Limitation of Liability
 ARTICLE VII  GOVERNING LAW; ARBITRATION
 Governing Law
 Arbitration Dispute
 HKIAC HKIAC Rules
  18




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ARTICLE VIII  MISCELLANEOUS
 Enforcement on Behalf of the Company
 Entire Agreement; Amendments
  19




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Inspection
 Waiver
 Assignment provided provided
 Severability
  20




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Remedies
  Headings
 Notices
  
  
  21




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Further Assurances
 No Fiduciary Relationship
 22




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E-HOUSE (CHINA) HOLDINGS LIMITEDBy:
    /s/ Xin ZhouName:
    Xin ZhouTitle:SINA CORPORATIONBy:
    /s/ Charles ChaoName:
    Charles ChaoTitle:CHINA REAL ESTATE INFORMATION CORPORATIONBy:
    /s/ Xin ZhouName:
    Xin ZhouTitle: Signature Page to Shareholders Agreement