What does black history mean?

Black history is a disgraceful experience in the past. Black history refers to negative and disgraceful events or experiences, and refers to some unknown secrets or scandals of individuals or groups in the past, including criminal records, arrest records, medical records, private lives and so on. Black history is considered disgraceful, immoral, illegal or immoral, so it is hidden, covered up or ignored. But sometimes black history can also be used to reveal the truth, promote change and urge people to reflect on history and reality. Black history is more of a teasing or not serious word, which does not necessarily represent the true nature or severity of these events. In some cases, the so-called "black history" is hidden for confidentiality or other political purposes.