Support Chinese translations through Gengo
It does not seem to be possible to order Chinese translations (both simplified and traditional) via the "Order translations" option

Chinese simplified and Chinese Traditional are among the target languages offered by Gengo.
Also, these options are available in the translation order language menu in POEditor.
However, please note that not all source languages have Chinese simplified and Chinese Traditional as available target languages, so please make sure you select a source which does pair with these target languages (like English).
If you require further assistance, please contact us at info@poeditor.com and include any information relevant to your case.