This is overall good as a blurb, it sets up the character and the story nicely. I do have some grammar and structure adjustments, though, and I will improvise a bit on some details, feel free to correct if I'm off the mark.
After a break-up, Lia Lin Ai got into a fatal car accident. Strangely, a cupid offers her a second chance at life, putting Lia Lin Ai's soul into the body of a girl with a similar name. Without the memories of said girl, can Lin Ai live her life? What happens when her old connections come into the picture?
Ok, so, this packs a lot of info, which is great, but I'm having some trouble following the structure. I'm going to try to re-write this in a way I think would be clearer:
Li Yuan, Emperor of Tang Dynasty, Empress Fang, and Concubine Wu are in an entanglement. Two sons are born - the battle for the position of Empress begins.
Bloodshed and betrayal are the norm at the imperial court, and history tends to repeat itself. With one innocent already ruined and the land turned chaotic, the palace schemes of the three individuals will dictate the fate of the Tang Dynasty.
Will they choose right or wrong?