The life swap begins with Consort Hua becoming Lady Qin.

Nian Shilan and Xiao Qinshi agreed to swap lives. Xiao Qinshi, with a face like Guanyin but a heart like a snake, went to her time to protect the Nian family, while Nian Shilan came to the Qin family and became Qin Shilan, paving a broad road for her so that she would have no regrets.
Nian Shilan, now known as Madam Qin, looked at the Dongchang Marquis's family, which seemed so clueless, and sneered before unleashing her full power:
To the frail and delicate Lady Qin: "You shameless woman, you're just being pretentious!"
Facing the second son of the Qin family: "You mediocre and incompetent fellow, you want to be my elder brother? First practice riding and archery, then study literature. Become successful first."
When faced with her elder sister's dying request for her to marry into the Marquis's household, she merely sneered:
"Me, become that good-for-nothing's concubine? Take care of your son? You probably don't even know what death means when you're about to die! Fine, the moment I step into the Gu family's door, I'll strangle that little beast you left behind, turning this joyous occasion into a tragedy, making his Ningyuan Marquis's mansion extinct, how about that?"
The story of Xiao Qinshi becoming Nian Shilan will likely be written later.