Song ci works can be seen in the concentration of two or more writers, and there are quite a few. There are many such examples in the famous Song Ci, Zhu Yu Ci, Liu Yi Ci, Shouyu Ci, and West Chamber Yuefu.
There are about 80 poems in Selected Works with wrong names, about 20 in Selected Works of Linz and about 30 in Continued Caotang. Later generations failed in the exam, and Chen Xiangyin also made various mistakes in collecting words.
Robbie in the Song Dynasty has done some work to distinguish the true from the false. He collated Ouyang Xiu's Modern Yuefu, and explained it in the proofreading notes, without drawing a conclusion. There are occasional textual researches on the engraving of Golden Hair. However, he lacks a calm and serious attitude, makes arbitrary judgments, and mistakenly abridges and supplements words, which is inevitably arbitrary.
In the process of compilation, we try our best to correct the mistakes and clarify the confusion of our predecessors. For example, Ouyang Xiu's poem "The Night of the Last Yuan Dynasty" was mistaken for Zhu's work by Yang Shen and added to the poem "Heartbroken Words" by mistake. Not long ago, someone published an article that Yang was right. In fact, this word existed in Ou Ji in Song and Yuan Dynasties, and it is not appropriate for Song people to overturn this conclusion casually.
Another example is the last "Fairy Song" in Pujiang Ci, which has been found in Yao Zeng's Yuefu Elegant Ci. Yao Zeng's time was much earlier than Lv Zu's, and this word was never written by Lv Zugao. The Collection of Qiang Villages is dedicated to Zhu Yi's Suishan Poetry, and there are only five words left, one of which was written by Wang Tingxuan and the other by Zhang.