The original meaning of tun is the bud of plants, and it is extended to gestation, hardship and wholeness. In addition, chariots also mean stationing defense. On the other hand, the word "cloud" was originally used to indicate the difficulty in unearthing plants, so the word "cloud" was used instead. The word "Tun" was extended from garrison defense to occupation and stationing.
Dugua is one of the sixty-four hexagrams in the Book of Changes. The names of hexagrams 6:4 and 6:4 are the code names for hexagrams.
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