Thang-ga, also known as Tangga, is a Tibetan transliteration, referring to religious scroll paintings mounted with colored satin and suspended for worship. Tangka is a unique painting art form in Tibetan culture. Its subject matter covers Tibetan history, politics, culture and social life. Most of Tangka handed down from generation to generation are works of Tibetan Buddhism and this religion. Tangka is a unique painting art form in Tibetan culture. With distinct national characteristics, strong religious color and unique artistic style, the world of the sacred Buddha is depicted with bright colors. Traditionally, the pigments are all precious minerals such as gold, silver, pearls, agate, coral, turquoise, malachite, cinnabar, saffron, rhubarb, indigo and other plants as pigments to show their sacredness. These natural materials ensure that the Tangka painted is bright in color and dazzling, although after hundreds of years, it is still bright in color. Therefore, it is praised as a treasure of the Chinese national painting art, known as the Tibetan "encyclopedia" and a precious intangible cultural heritage of the Chinese national folk art.