Qi Has an Edge and Xi Has a Bank.

Princess An Wanxian of Heqing County in the Northern Jin Dynasty met the Prince Li Yu of the Northern Jin Dynasty when she was young. As expected, she would love him until death. She shouldn't, absolutely shouldn't, but she lost her memory and turned into Luo Nianqing, the concubine of the Luo family in Nanbian, falling in love with the free and easy eldest son Tang Xiao. Everything should go back to how it was before, but if your heart has changed, how can you go back?