Hi Renee,
Thanks for contacting Wazuh,
Yes the OS is outdated and we recommend upgrading to the supported version of Windows to make sure encoding settings are set properly.
However, researching I see issues
#4094 and #9063 have been open about Wazuh compatibility with Chinese characters, you can also monitor them, while I contact the assigned team to see if there has been any progress.
Best Regards,