Hi Wei,
The use of resource files is kind of the legacy implementation, I don't use it anymore for my config files for the demo site. It is best to leave the ResourceFile setting blank and just put what you want in the name and title. Forcing a specific culture may not work correctly during new site creation which is when the content is created, it "might" work if you set the culture for the expected siteid of the new site but in general I think its best to not worry about resource files for that and just put the content in the config files without specifying a resourcefile name.
Best,
Joe