At first I also feel flustered when I saw yang cei Wei was played by other actress instead of JJY(in ep1 and 2).
But the think at that time pan yue doesn't have proper feelings for yang cei Wei because they haven't met since 10 years and even if he loves her the most he didn't know how she looks like after 10 years when he saw characteristics of her and token then after he concluded that she is her childhood friend yang cei Wei. After body swapping he really fell in love with yang cei Wei in JJY body(at first he only wants to marry her because she was her best childhood friend and also a marriage contract was also there) so at first he didn't care about looks and wants to marry her(not because of love) but as they spend more time with each other(when JJY plays the role) he really fell for her.
This review is for those who dropped this drama because of body swapping and all.