Create the report (jrmxl) with font name Arial Unicode MS and follow the below steps

1. Arial Unicode.jar (size 14829kb) file needs to be copied into jasper server folder (C:\Jaspersoft\jasperreports-server-cp-6.3.0\apache-tomcat\webapps\jasperserver\WEB-INF\lib)

2. Restart the jasper service

All the reports like below

replace: fontName=”Arial Unicode MS” pdfEncoding=”Identity-H”

upload the file and you can get the Chinese character on the report