Duke Zhou dreamed that his father's grave was wide open and there were no bones left.

Dreams are the expression of people's subconsciousness and the combination of many fragmentary subconsciousness. Your dream shows that your subconscious memory has pictures of your father's grave being opened and his bones missing. These images often come from past experiences or media or imagination or sleep feelings, but they may actually have no memory. Dreams string them together. The content of dreams generally has nothing to do with reality. But dreams can reflect people's thoughts. This dream may reflect that you miss your father and worry about the safety of his grave.