It is a commercial license font. You can find legitimate licenses through distributors like MyFonts , FontShop , or The Font Foundry.
If you are looking for a similar bold, modern Traditional Chinese style without a commercial license, consider these options: Df Zong Yi Traditional Chinese Font Download
Because of its heavy footprint, Df Zong Yi isn't meant for long-form reading. Instead, it shines in: It is a commercial license font