The answer is: incorrect.
It is generally believed that literati's lyrics began in the Tang Dynasty and flourished in the Song Dynasty, and then slowly declined. Ci has existed since ancient times, and there are many folk songs in the Book of Songs, which are the predecessors of Ci. The lyrics were originally called "melody lyrics" and were used to be sung with music. In ancient times, literati paid attention to elegance. In addition to reciting poems and singing in harmony with each other, they often wrote lyrics for troupes, troupes, and kabuki artists to sing along with the music. It gradually became popular in the Tang Dynasty, but it was not called lyrics at that time. , called Shuqu'er, and literati also called it "Shiyu", which means it is a work after writing poetry. At that time, there were no completely fixed formats and rhyme restrictions for lyrics. It could be renovated, old songs could be sung new, and words or phrases could be added or deleted. The poetry of the Tang Dynasty also originated from "Yuefu", absorbing more nutrition from poetry, and gradually became more standardized and elegant than in the past. But there were not many Ci poems at that time, such as Caimulberry, Qingpingle, Huanxisha, Sauvignon Blanc, Qingpingdiao, etc., and traces of the Book of Songs can still be seen. The great poet Li Bai was good at music and often wrote some lyrics. Among them, "Recalling Qin'e" and "Xiao Shengyan" were respected by later generations as the "ancestor of poetry for a hundred generations". Of course, he was not the first to write lyrics, but it can also be seen that There are not many good words for being able to be in the "elegant hall" at that time. Later, Li Jing and Li Yu promoted Ci, and because they were emperors, their influence began to spread. It wasn't until the Song Dynasty that the rhythm of lyrics began to become fixed. People organized words according to the fixed rhythm requirements of lyrics, so it was called filling lyrics. It became the patent of cultural people and gradually separated from music. This may also be a reflection of the popularity of Ci in the Song Dynasty! However, once the metrical restrictions are strict, it will not be easy to develop, the hands and feet will be imprisoned, and it will gradually decline. This is the reason why Wanderer said: "People who compile metrical books can't write good words themselves, so they make a cage to trap others." Of course, it may be a bit extreme, but the truth is correct. By the way, if you like Ci, you should check out Liu Yong. He had a great influence on the development of Ci.