Supplement:
Yin. That is, chanting in a restrained tone. Shensi's "Seeking Sound to Identify Legal Ink" and "Engraving Sound" can be regarded as the annotation of "sound". Specifically, with the help of certain forms of expression (chanting), the poet transforms the "feeling" (feeling) generated by the stimulation of foreign objects (things) into sensible emotions (wishes). "Sound" is a key to China's poetry creation. Generally speaking, syllables and steps are free, and there are five characters, seven characters and miscellaneous words in form.