Aquilaria sinensis is like bread crumbs. Why does the sword spirit hide the past?

The reason why agarwood hides Ying Yuan's pale past is because she is afraid of his hatred. According to the relevant public information inquired, agarwood is like crumbs. The reason why Jian Ling concealed Yan Yuandan's past is because she was afraid of being hated and rejected by Yan Yuandan, so she had to conceal her life experience. In addition, she felt guilty about Ying Yandan and worried that her incompetence had consumed Ying Yandan's hard work, so she chose to remain silent.