Because its language is archaic and obstruse with numerous allusions and rare words,there are often mistakes in punctuation and explanation for it in past studies.

Its main characteristics have three: thoroughly study, accurate covariance, clearly grain, deeply exhumation, much attention to the punctuation, definite discriminator between exactitude and the mistake.

Study on the word "adoptive mother" from the point of view of the history of Chinese language and culture,will involve the textual criticism,punctuations and historical facts.

In order to achieve better performance results,but he often breakthroughed the various dramatic law,and even undermined his own enacted song laws,sentence repentances is a good example of the phenomenon.