Reading the error message it looks like you have 2 problems:

W: Duplicate sources.list entry http://ubuntu.cn99.com gutsy-updates/multiverse 
Packages 
(/var/lib/apt/lists/ubuntu.cn99.com_ubuntu_dists_gutsy-updates_multiverse_binary-i386_Packages)
E: Problem parsing dependency Depends
E: Error occurred while processing poppler-data (NewVersion1)
E: Problem with MergeList 
/var/lib/apt/lists/ubuntu.cn99.com_ubuntu-cn_dists_gutsy_main_binary-i386_Packages
E: The package lists or status file could not be parsed or opened.

1) There seem to be duplicate entries for repositories in your 
'/etc/apt/sources.list' file.
2) Something seems to be wrong with the file 
"/var/lib/apt/lists/ubuntu.cn99.com_ubuntu-cn_dists_gutsy_main_binary-i386_Packages".
  You should be able to delete it and then run and an update and be good to go.

-- 
update manager crashes 
https://bugs.launchpad.net/bugs/90113
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