Duke of Zhou dreamt that he found a long bug bitten by a dog and ran away.

Dreaming of bugs indicates mistakes in life. The dog in the dream is the image formed in the dream by the dreamer's own conscience working in the inner subconscious. But if the bug is bitten by a dog and runs away, it may be that something he did before he made a mistake was questioned by his conscience or his own principles, and he turned from wrong to right.