Beloved Concubine in Troubled Times

A hidden historical truth, a time-travel romance staged in the ancient city of Blackwater. He was a wealthy official of the Sui Dynasty, and he held the world's financial power, but he made outstanding achievements in destroying the Sui Dynasty and establishing the Tang Dynasty. She was the daughter of the richest man in the Jialan Kingdom, and she was married under a conspiracy but took advantage of the troubled times to make a fortune. He found the treasure of the Black Water and helped the king achieve great things but was unknown in history; she followed him all the way, treating her wealth as her life but she spent all her money just for him.