Heaven knows the earth, you know me, and I know the purpose of Yang Zhen's words.

"Heaven knows the earth, you know me." Yang Zhen said this sentence to refuse to accept a gift.

No one knows except you and me. From Yang Zhenchuan, Volume 54 of the Book of the Later Han Dynasty.

The contents are as follows: When leaving the county, the road passed through Changyi, so Wang Mi, maocai, Jingzhou, was ordered by Changyi to pay an audience with ten catties of gold at night to prevent shock. Zhen said, "An old friend knows a gentleman, but you don't know an old friend. How can you know him?" The secret: "Twilight is ignorant." Zhen said, "Heaven knows, earth knows, I know, I know. What is ignorance? " Come out in shame. When he passed Changyi on his way to the county seat, Wang Mi, a former Jingzhou maocai, was appointed as the magistrate of Changyi County to visit Yang Zhen and gave him ten Jin in the evening. Yang Zhen said, "An old friend knows you, but an old friend doesn't know why you are?" Wang Mi said: "It's late at night, and no one will know." Yang Zhen said, "Heaven knows, earth knows, I know, and you know. No one knows how to say it. " Wang Mi left in shame.

Yang Zhen was born in Huayin County, Hongnong County, Eastern Han Dynasty. He is a fair and honest man, and he does not seek personal gain. He is a rare honest official. Because of the bribe he refused to accept, he said the famous sentence "Heaven knows, earth knows, I know and son knows", which became the source of his honesty and self-control and refused to accept unjust gifts. Later generations also quoted it as "heaven knows the earth, you know me", which means that things are extremely important secrets.