The original meaning of the word: draw a bow and shoot an arrow, and a gentleman draws without sending it. The extended meaning of "Yin" is: pull, stretch and delay. Such as gravity, neck pulling, singing and stretching. Then extended to: cited, recruited. Such as: introduction, introduction, guidance, guidance, quotation. "Yin" is a knowing word. The word "Yin" has not changed much from ancient times to the present, and it all comes from the bow, and "Yin" means arrow. The arrow is on the string and will be launched soon. Its original meaning is "opening the bow" (saying), that is, opening the bow.

Chinese characters:

Chinese characters (pinyin: hàn zì, phonetic notation: ㄢˋˋ), also known as Chinese characters and Chinese characters, are recorded symbols of Chinese and belong to morpheme syllables of ideographic characters. One of the oldest characters in the world has a history of more than 6000 years. In form, it gradually changes from graphics to strokes, pictographs to symbols, and complex to simple; In the principle of word formation, from ideographic, ideographic to phonological. Except for a few Chinese characters (such as Zi, Zi, Zi, Chi and Zi), they are all one Chinese character and one syllable.