The Han People worship "yi" since ancient times. They hold the belief that all things on earth comes from "yi", because "yi" has the similar meaning with "yuan"，"shi"，"chu"，meaning "the source". The Taoist believes that "One makes two,and two make three,and three make everything on earth. "yi" sometimes means complete. For example, "all the things"，"yi" often goes together with other words expressing "quantity"，but means "whole or complete". For example,"wirti mud all over the body" "lead a poor life the whole lifetime". Even when "yi" goes with "little"，"small" or other words expressing "small amount or little quantity"，"yi" again means "whole，complete". For example, "not soiled by a speck of dust"，"not be the least negligent"，etc. According to the latest Chinese dictionary, the collocated expressions beginning with the word "yi" has a list of more than 640 entries.