Xing Yu already know that she will be dead anyway so she want to left behind some memorable momento for her beloved Jing to remember. and also for something to be left behind as the traces of their love together. and for us, so this whole story can be happened
Uhm, did Jing also died or she just vanished to Xiao Lan's life? I mean, Maria can stay in the sun despite being a vampire, right? Or maybe that's just her ability for being a red haired vampire? I'm kinda confused.