"AR PL SungtiL GB" is a high-quality Chinese TrueType font (gbsn00lp.ttf) generously provided by Arphic Technology to the Free Software community under the "Arphic Public License".

You also need to install the "latex-cjk-chinese-arphic-gbsn00lp" package for typesetting with Omega or with CJK for LaTeX (cjk-latex).