(traditional) Han Wang Yan Kai calligraphy font
Han Wang Yan Kai is a one of the font created by Taiwan professor Wang Han Zong (王汉宗), and is part of the open source font pack (Wang Han Zong Free Font Type) released under GNU GPL license. This means that you can use this font in any project you want including commercial works.
Free for personal and commercial-use.
*Please download the font pack, extract it and look for font name “wt064.ttf” which is this font.