When my child was 3 months old, a woman came to my home. She looked older than me, with an average appearance and slim figure. She handed me a letter, asking me to pass it to my husband, Mr. Zhang. The letter was not sealed, so after she left, I opened and read it. The words in the letter were extremely ambiguous. When I gave the letter to my husband and asked him who that woman was, he said unnaturally, ignore her, she is crazy.