LabVIEW 6.1 for Linux does not officially support Chinese characters. Depending on the version of your Linux OS, the problem might be fixed by modifying the Language Option and the Local Setting, but in the case of RedHat 8.0, there is currently no way to display correct Chinese characters in LabVIEW 6.1. The Chinese version of Turbo Linux is an example of a Linux OS that will support Chinese characters in LabVIEW 6.1.
The same problem also occurs with other East Asian Languages.