In the 《易传》(Yizhuan) it is said: “The wise man of a later generation made by writing the 《易经》(Yijing), a break-1 through.” Here “Wise man” refers again to 仓颉[CangJie], “made by writing records the 《易经》(Yijing)”. The so-called “Records” refer to characters, that were carved into the wood using a dagger. The 《易经》(Yijing) are the “Eight Trigrams” invented by 伏羲[FuXi]. The 《易经》(Yijing) uses the principle of Yin and Yang, that applies to all the living things in the earth.