Although Liu Yong's social status is low, he expanded and developed slow ci, opened up the theme of ci, enriched the expression forms of ci, and absorbed a large number of colloquial words, which made great contributions to promoting the transformation and development of Song ci.
Liu Yong's reputation in literary history is not good. His name is "greasy willow", which means "complaining changes into willow". This nickname is famous, but Liu Yong played a great role in the development of ci. Liu Yong's most obvious contribution is to carry forward the form of slow words and long tones. Liu Yong filled in a lot of slow words and long tunes, singing in street songs for a while, being ignored by the upper class for a while, or secretly enjoying them, and being looked down upon by the public. Gai Yong's word "evil custom" has its own school, but it is not the top grade. Wang Zhuo commented on Liu Ci: "It is especially good for those who don't know books. If they are tasted, they will be rich. Although it is from the countryside, the sound is disgusting. " This criticism is quite mean, saying that Liu Qi is a petty bourgeoisie at best, dare to mix with the upper class? Although glamorous, he is still just a nouveau riche.
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