Please recommend a transmigration novel with the female protagonist being the Queen of the Cold Palace. The background is set in fictional history.

He had read a novel in which the female protagonist had transmigrated to an unknown dynasty and turned into a queen, but she was in a cold palace. After transmigrating, he immediately hit the concubine. His father was the Prime Minister, but he didn't know the official position of the Prime Minister. Before he transmigrated, the real Empress already had a son and a daughter, and her son was the Crown Prince. The female lead also gave birth to twins with the male lead. It seemed that they were twins of a boy and a girl. She seemed to have given birth to a few more after that. He did not know if the name of the dynasty was the Dragon and Phoenix Dynasty. It seemed that the male protagonist had also dispersed his harem in the end and stayed with the female protagonist. I've seen the great gods asking for help, but I can't find them... I've searched for the following three answers, but none of them are true. Does anyone else know? Sincere help ~~~