Inside the Hue Royal Palace heritage site, at Duyet Thi Duong Theater (the theater for the king, royal family members, and mandarins to enjoy traditional royal operas) stands a space exhibiting hundreds of tuồng (traditional Vietnamese opera) masks, which get tourists to stop to explore.

The dragon, known by the character "long", is a mythical creature steeped in supernatural qualities, standing at the forefront among the four sacred animals: "dragon, unicorn, tortoise, phoenix". It emerged thousands of years before the Common Era, gradually elevated to a symbol in East Asian culture. The dragon is seen as the ruler governing the rivers and seas, often referred to as the Dragon King.