How is Yan's timbre and expressive force?

Yan's timbre is deep, sad, mournful and endless, and its sound is turbid, mournful and faint, which has a unique musical quality. Perhaps it is this special timbre that gave Lu and Lu a sacred, elegant, mysterious and noble spiritual temperament in their long-term artistic feelings and comparisons. The expression of "Cloud" and "Cloud" reflects the position and function of China traditional Confucian ethical culture in the historical development of China. In a sense, it is not an instrument that is usually used to play, but an instrument of meditation and nostalgia.

Classic Nuo songs include Mourning for the Past, Nagato's Complain, Boya's Complain, Long Pavilion's Complain, Mountain Flowing Water, Guan Shanyue, Yangguan Sandie, Su Wu's Shepherd, Shan Gui and so on. Or they perform China's classical songs, or they compose music specially by Kui. Almost all Kunqu operas are inseparable from sadness, and some Kunqu operas can play sadness with their unique timbre, which is beyond the reach of other instruments I have heard. Traditional literati are full of temperament and emotional troubles. Yan's unique timbre may just reflect the temperament of traditional literati, so it is loved by many traditional literati, but despised by ordinary people, especially those who like to be lively and festive. Just for some people who love it. According to textual research, apart from some solos, Yan is mostly used in some folk music, or appears as a unique supporting role in some famous classical songs.