Exhibit 4.51
 EXECUTION VERSION   CONFIDENTIAL
 TRADEMARK LICENSE AGREEMENT
 Agreement  Licensor Licensee Parties Party
 RECITALS
 WHEREAS, SINA CRIC Share Purchase Agreement
 WHEREAS,
 WHEREAS, SINA Leju Original
Agreement Exhibit B
 NOW, THEREFORE,
 ARTICLE I  DEFINITIONS
  Action
 Affiliate




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Agency Agreement
 AIC
 Branding Guidelines
 Business
 Business Day
 Change of Control
 Claimant
 Commission
 Competitor
 Confidential Information
 Dispute
 Effective Date
 E-House Licensed Data and Information
 Exclusive Licensed Marks   Exhibit A
 2




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Governmental Authority
 Initial Term
 Law
 Licensed Marks Exhibit A
 Licensed Products
 Licensee Parties
 Licensee Websites
 Licensor Parties
 Master Transaction Agreement
 Non-Exclusive Licensed Marks   Exhibit A
 Person
 PRC Territory
 Recipient
 Respondent
 Rules
 Shareholders Agreement
 3




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##### 



Term
 Trademarks
 ARTICLE II  GRANT OF LICENSE
 Grant of License
   
 provided, however,
 4




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##### 



Fees provided
 Usage Restrictions
  provided
  (provided, however, provided (provided, however provided
 5




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##### 



Territory Restrictions
 Licensors Use.
 ARTICLE III  QUALITY CONTROL
 Quality Control Branding Guidelines provided
 Compliance with Laws
 ARTICLE IV  OWNERSHIP
 Ownership
 6




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##### 



Exhibit A
 Prosecution and Maintenance
  
 ARTICLE V  ENFORCEMENT
 Notification
 Licensor Enforcement
  7




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##### 



provided however,
 ARTICLE VI
 TERM AND TERMINATION
 Term Initial Term Term
 Termination for Bankruptcy
 Termination for Breach
 By Licensor provided however
 By Licensee. provided however
 8




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Termination for a Change of Control
 Termination in the Event of Termination of Agency Agreement
 Effect of Termination
 Survival
 ARTICLE VII
 REPRESENTATIONS AND WARRANTIES
 Representations and Warranties
 By Each Party
 By Licensor
  9




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Disclaimer
 ARTICLE VIII  INDEMNIFICATION
 Indemnification by Licensor Licensee Parties Action
 Indemnification by Licensee Licensor Parties
 10




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ARTICLE IX  CONFIDENTIALITY
 Confidential Information Recipient Confidential Information
 Exceptions provided, however
 ARTICLE X  GENERAL PROVISIONS
 Taxes
 11




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##### 



Expenses
 Notices st st
 if to Licensor
 
  th
 if to Licensee
 
 12




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##### 



Public Announcements
 Severability
 Entire Agreement
 Assignment provided
 Amendment
 Waiver
 13




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##### 



No Third Party Beneficiaries
 Governing Law
 Dispute Resolution Dispute Claimant Respondent Commission Rules
   14




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##### 



No Presumption
 Specific Performance
 Force Majeure provided however,
 Counterparts
 Governmental Recordation AIC
 15




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##### 



Termination of Original Agreement Exhibit B Exhibit B
 [SIGNATURES ON NEXT PAGE]
 16




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IN WITNESS WHEREOF
 Beijing SINA Internet Information Service Co., Ltd.By:

/s/
Charles ChaoName:Title:Beijing Yisheng Leju Information Services Co., Ltd.By:

/s/
Fei CaoName:Title: 17




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EXHIBIT A
 LICENSED MARKS
 NON-EXCLUSIVE LICENSED MARKS
 Registration
    
    Registration/Status
    
    Period/Application Date
    
    Application No.
    
    Categorysina
    
    Registered
    
    
    10/21/200010/20/2010
    
    
    
    1463676
    
    
    
    35sina (CHINESE CHARACTER)
    
    Registered
    
    
    10/14/200010/13/2010
    
    
    
    1459585
    
    
    
    35(CHINESE CHARACTER)
    
    Registered
    
    
    10/21/200010/20/2010
    
    
    
    1463781
    
    
    
    35
 EXCLUSIVE LICENSED MARKS
 RegistrationPeriod/Application
    
    Registration/Status
    
    Date
    
    Application No.
    
    Category(CHINESE CHARACTER)
    
    Application
    
    
    12/18/2008
    
    
    
    7120368
    
    
    
    35(CHINESE CHARACTER)
    
    Application
    
    
    12/18/2008
    
    
    
    7120374
    
    
    
    35
 18




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EXHIBIT B
 MUTUAL TERMINATION AGREEMENT
 Termination Agreement     Beijing SINA SINA Leju
 WITNESSETH:
 Original Agreement
        SIGNATURES ON NEXT PAGE
 19




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IN
WITNESS WHEREOF,
 Beijing SINA Internet Information
Service Co., Ltd.By:Name:Title:Shanghai SINA Leju Information
Technology Co. Ltd.By:Name:Title: 20