以精丽工巧著称的昆曲在经历“家家收拾起,户户不提防”的盛况后在清代中后期逐渐走向衰落。花部乱弹取代雅部正声,成为人们竞相追逐的新的艺术形式。对“雅部”昆曲而言,讲究的唱法一方面使它富有无穷的魅力,另一方面又使它在追求极致的过程中作茧自缚。并最终导致它在与“花部”的数次对抗中走向衰落。魏良辅在《南词引证》中这样阐述:“五音以四声为主,但四声不得其宜。五音废矣,平上去入,务要端正。有上声字,扭入平声, Cleverly crafted Kunqu opera in the experience of ”every family pack up, every household does not guard “ after the event in the late Qing dynasty gradually decline. The Ministry of Science and Technology has replaced the ritual of the Ministry of Justice with the Ministry of Science and Technology to become a new art form that people are chasing after each other. For the ”Jakob“ Kunqu opera, elegant singing on the one hand it is full of infinite charm, on the other hand it makes it in the pursuit of the ultimate process of cocoon. Eventually leading to its decline in several confrontations with Flower Department. Wei Liangfu in the ”Southern Ci cited“ in this elaboration: ”Five tones to the main four, but the four unsuitable." Five-tone waste carry on, into the flat, should be corrected.