The contents of I Ching consist of 64 hexagrams and explanation for each. Hexagram is a group of six broken or unbroken lines. The broken line (the line where the middle part is missing) represents yang, and the unbroken line represents yin. From the bottom to top, six lines are gathered in parallel. There exists one different name for one hexagram. In I Ching, the name of one hexagram and the hexagram itself comes first, and after those, there are different explanations for the hexagram and the each line consisting hexagram, from bottom to top. There comes next hexagram after explanations of all lines of one hexagram.