Hmmm both could use some work to be honest, but I'll focus on the second one.
You could make the summary a bit less crowded by breaking it apart in two parts. Content wise I think your summary contains everything I'd need as a reader: the main character and the plot that makes the story special, and stakes that come along with it.
Lia Lin Ai's life is abruptly taken away in an accident after a breakup, before a cupid offers her second chance at life. Accepting the offer, Lia Lin Ai's soul merges with the body of a girl with a similar name.
Is Lin Ai able to live this new life without access to her host's past memories? And how will she deal with old connections coming back into the picture?
Tried to write another version of the summary where I broke up the summary in two and changed it up a little.