upgrade SQL server 2008 R2 sp3,KB 2979597, show version still 10.50.1600.1 on SQL management studio,what happened?

Product features discovered:
  Product              Instance             Instance ID                    Feature                                  Language             Edition              Version         Clustered
  Sql Server 2008 R2   MSSQLSERVER          MSSQL10_50.MSSQLSERVER         Database Engine Services                 1033                 Standard Edition     10.50.1600.1    No       
  Sql Server 2008 R2   MSSQLSERVER          MSSQL10_50.MSSQLSERVER         SQL Server Replication                   1033                 Standard Edition     10.50.1600.1    No       
  Sql Server 2008 R2   MSSQLSERVER          MSSQL10_50.MSSQLSERVER         Full-Text Search                         1033                 Standard Edition     10.53.6000.34   No       
  Sql Server 2008 R2   MSSQLSERVER          MSAS10_50.MSSQLSERVER          Analysis Services                        1033                 Standard Edition     10.50.1600.1    No       
  Sql Server 2008 R2   MSSQLSERVER          MSRS10_50.MSSQLSERVER          Reporting Services                       1033                 Standard Edition     10.50.1600.1    No       
  Sql Server 2008 R2                                                       Management Tools - Basic                 1033                 Standard Edition     10.50.1600.1    No       
  Sql Server 2008 R2                                                       Management Tools - Complete              1033                 Standard Edition     10.50.1600.1    No       
  Sql Server 2008 R2                                                       Client Tools Connectivity                1033                 Standard Edition     10.50.1600.1    No       
  Sql Server 2008 R2                                                       Client Tools Backwards Compatibility     1033                 Standard Edition     10.50.1600.1    No       
  Sql Server 2008 R2                                                       Client Tools SDK                         1033                 Standard Edition     10.50.1600.1    No       
  Sql Server 2008 R2                                                       Integration Services                     1033                 Standard Edition     10.50.1600.1    No