The traditional study of the pre-Qin sound system focuses more on the rhyme, so the research of the onset, the other subsyllabic composition, is inevitably not sufficient. Solid development has been gained with the help from techniques such as homophony. The recent study on the ancient phonology reconstructs the imitative sounds for all the ancient Chinese syllables, but they still need to be examined and analyzed by using the ”Shi Jing”. The poetic elements, such as rhyme and meter, in ”Shi Jing” are able to show how syllables are formed and uttered at that time; moreover, the text itself and its many versions also disclose how prefixes or suffixes are used in the initial and finals to make compound consonants and how liaison and phonetic contraction can be found. Some imitative sounds in the first three chapters of ”Guan Jü” and examples of phonetic loan characters and phonetic contraction are used in the paper to illustrate their functions and explain how valuable Shi Jing is to the study of ancient Chinese phonology.