Tian Huang was loved by the Qing emperors because of its royal yellow color and was regarded as a treasure. At the same time, Tian Huang was highly praised by the literati and regarded as a treasure. Since the Qing Dynasty, Tian Huang has enjoyed a high reputation, and its price is comparable to that of jade. Tian Huang pays attention to the "Liu De" theory of "being warm, moist, fine, congealing, congealing and greasy".